diff --git a/exps/LFNA/lfna-debug.py b/exps/LFNA/backup/lfna-debug.py
similarity index 89%
rename from exps/LFNA/lfna-debug.py
rename to exps/LFNA/backup/lfna-debug.py
index b5a3963..969d9d1 100644
--- a/exps/LFNA/lfna-debug.py
+++ b/exps/LFNA/backup/lfna-debug.py
@@ -25,6 +25,7 @@ from xlayers import super_core
 
 
 from lfna_utils import lfna_setup, train_model, TimeData
+from lfna_models import HyperNet
 
 
 class LFNAmlp:
@@ -77,17 +78,40 @@ def main(args):
             nkey = "{:}-{:}".format(i, xkey)
             assert nkey in env_info, "{:} no in {:}".format(nkey, list(env_info.keys()))
     train_time_bar = total_time // 2
-    network = get_model(dict(model_type="simple_mlp"), **model_kwargs)
 
     criterion = torch.nn.MSELoss()
-    logger.log("There are {:} weights.".format(network.get_w_container().numel()))
+    logger.log("There are {:} weights.".format(model.get_w_container().numel()))
 
     adaptor = LFNAmlp(args.meta_seq, (200, 200), "leaky_relu", criterion)
 
     # pre-train the model
-    init_dataset = TimeData(0, env_info["0-x"], env_info["0-y"])
-    init_loss = train_model(network, init_dataset, args.init_lr, args.epochs)
+    dataset = init_dataset = TimeData(0, env_info["0-x"], env_info["0-y"])
+
+    shape_container = model.get_w_container().to_shape_container()
+    hypernet = HyperNet(shape_container, 16)
+
+    optimizer = torch.optim.Adam(hypernet.parameters(), lr=args.init_lr, amsgrad=True)
+
+    best_loss, best_param = None, None
+    for _iepoch in range(args.epochs):
+        container = hypernet(None)
+
+        preds = model.forward_with_container(dataset.x, container)
+        optimizer.zero_grad()
+        loss = criterion(preds, dataset.y)
+        loss.backward()
+        optimizer.step()
+        # save best
+        if best_loss is None or best_loss > loss.item():
+            best_loss = loss.item()
+            best_param = copy.deepcopy(model.state_dict())
+    print("hyper-net : best={:.4f}".format(best_loss))
+
+    init_loss = train_model(model, init_dataset, args.init_lr, args.epochs)
     logger.log("The pre-training loss is {:.4f}".format(init_loss))
+    import pdb
+
+    pdb.set_trace()
 
     all_past_containers = []
     ground_truth_path = (
diff --git a/exps/LFNA/backup/lfna_models.py b/exps/LFNA/backup/lfna_models.py
new file mode 100644
index 0000000..2e163c7
--- /dev/null
+++ b/exps/LFNA/backup/lfna_models.py
@@ -0,0 +1,50 @@
+#####################################################
+# Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2021.04 #
+#####################################################
+import copy
+import torch
+
+from xlayers import super_core
+from xlayers import trunc_normal_
+from models.xcore import get_model
+
+
+class HyperNet(super_core.SuperModule):
+    def __init__(self, shape_container, input_embeding, return_container=True):
+        super(HyperNet, self).__init__()
+        self._shape_container = shape_container
+        self._num_layers = len(shape_container)
+        self._numel_per_layer = []
+        for ilayer in range(self._num_layers):
+            self._numel_per_layer.append(shape_container[ilayer].numel())
+
+        self.register_parameter(
+            "_super_layer_embed",
+            torch.nn.Parameter(torch.Tensor(self._num_layers, input_embeding)),
+        )
+        trunc_normal_(self._super_layer_embed, std=0.02)
+
+        model_kwargs = dict(
+            input_dim=input_embeding,
+            output_dim=max(self._numel_per_layer),
+            hidden_dim=input_embeding * 4,
+            act_cls="sigmoid",
+            norm_cls="identity",
+        )
+        self._generator = get_model(dict(model_type="simple_mlp"), **model_kwargs)
+        self._return_container = return_container
+        print("generator: {:}".format(self._generator))
+
+    def forward_raw(self, input):
+        weights = self._generator(self._super_layer_embed)
+        if self._return_container:
+            weights = torch.split(weights, 1)
+            return self._shape_container.translate(weights)
+        else:
+            return weights
+
+    def forward_candidate(self, input):
+        raise NotImplementedError
+
+    def extra_repr(self) -> str:
+        return "(_super_layer_embed): {:}".format(list(self._super_layer_embed.shape))
diff --git a/lib/models/xcore.py b/lib/models/xcore.py
index 91a0498..b547554 100644
--- a/lib/models/xcore.py
+++ b/lib/models/xcore.py
@@ -37,4 +37,4 @@ def get_model(config: Dict[Text, Any], **kwargs):
         )
     else:
         raise TypeError("Unkonwn model type: {:}".format(model_type))
-    return model
+    return model
\ No newline at end of file
diff --git a/lib/xlayers/super_activations.py b/lib/xlayers/super_activations.py
index bf3f3e8..c4fbab6 100644
--- a/lib/xlayers/super_activations.py
+++ b/lib/xlayers/super_activations.py
@@ -38,6 +38,46 @@ class SuperReLU(SuperModule):
         return "inplace=True" if self._inplace else ""
 
 
+class SuperGELU(SuperModule):
+    """Applies a the Gaussian Error Linear Units function element-wise."""
+
+    def __init__(self) -> None:
+        super(SuperGELU, self).__init__()
+
+    @property
+    def abstract_search_space(self):
+        return spaces.VirtualNode(id(self))
+
+    def forward_candidate(self, input: torch.Tensor) -> torch.Tensor:
+        return self.forward_raw(input)
+
+    def forward_raw(self, input: torch.Tensor) -> torch.Tensor:
+        return F.gelu(input)
+
+    def forward_with_container(self, input, container, prefix=[]):
+        return self.forward_raw(input)
+
+
+class SuperSigmoid(SuperModule):
+    """Applies a the Sigmoid function element-wise."""
+
+    def __init__(self) -> None:
+        super(SuperSigmoid, self).__init__()
+
+    @property
+    def abstract_search_space(self):
+        return spaces.VirtualNode(id(self))
+
+    def forward_candidate(self, input: torch.Tensor) -> torch.Tensor:
+        return self.forward_raw(input)
+
+    def forward_raw(self, input: torch.Tensor) -> torch.Tensor:
+        return torch.sigmoid(input)
+
+    def forward_with_container(self, input, container, prefix=[]):
+        return self.forward_raw(input)
+
+
 class SuperLeakyReLU(SuperModule):
     """https://pytorch.org/docs/stable/_modules/torch/nn/modules/activation.html#LeakyReLU"""
 
diff --git a/lib/xlayers/super_core.py b/lib/xlayers/super_core.py
index 3e1d04f..8b9d3fd 100644
--- a/lib/xlayers/super_core.py
+++ b/lib/xlayers/super_core.py
@@ -28,9 +28,13 @@ from .super_transformer import SuperTransformerEncoderLayer
 from .super_activations import SuperReLU
 from .super_activations import SuperLeakyReLU
 from .super_activations import SuperTanh
+from .super_activations import SuperGELU
+from .super_activations import SuperSigmoid
 
 super_name2activation = {
     "relu": SuperReLU,
+    "sigmoid": SuperSigmoid,
+    "gelu": SuperGELU,
     "leaky_relu": SuperLeakyReLU,
     "tanh": SuperTanh,
 }
diff --git a/lib/xlayers/super_module.py b/lib/xlayers/super_module.py
index 5a85c51..58a6993 100644
--- a/lib/xlayers/super_module.py
+++ b/lib/xlayers/super_module.py
@@ -11,128 +11,10 @@ from enum import Enum
 
 import spaces
 
-IntSpaceType = Union[int, spaces.Integer, spaces.Categorical]
-BoolSpaceType = Union[bool, spaces.Categorical]
-
-
-class LayerOrder(Enum):
-    """This class defines the enumerations for order of operation in a residual or normalization-based layer."""
-
-    PreNorm = "pre-norm"
-    PostNorm = "post-norm"
-
-
-class SuperRunMode(Enum):
-    """This class defines the enumerations for Super Model Running Mode."""
-
-    FullModel = "fullmodel"
-    Candidate = "candidate"
-    Default = "fullmodel"
-
-
-class TensorContainer:
-    """A class to maintain both parameters and buffers for a model."""
-
-    def __init__(self):
-        self._names = []
-        self._tensors = []
-        self._param_or_buffers = []
-        self._name2index = dict()
-
-    def additive(self, tensors):
-        result = TensorContainer()
-        for index, name in enumerate(self._names):
-            new_tensor = self._tensors[index] + tensors[index]
-            result.append(name, new_tensor, self._param_or_buffers[index])
-        return result
-
-    def create_container(self, tensors):
-        result = TensorContainer()
-        for index, name in enumerate(self._names):
-            new_tensor = tensors[index]
-            result.append(name, new_tensor, self._param_or_buffers[index])
-        return result
-
-    def no_grad_clone(self):
-        result = TensorContainer()
-        with torch.no_grad():
-            for index, name in enumerate(self._names):
-                result.append(
-                    name, self._tensors[index].clone(), self._param_or_buffers[index]
-                )
-        return result
-
-    def requires_grad_(self, requires_grad=True):
-        for tensor in self._tensors:
-            tensor.requires_grad_(requires_grad)
-
-    def parameters(self):
-        return self._tensors
-
-    @property
-    def tensors(self):
-        return self._tensors
-
-    def flatten(self, tensors=None):
-        if tensors is None:
-            tensors = self._tensors
-        tensors = [tensor.view(-1) for tensor in tensors]
-        return torch.cat(tensors)
-
-    def unflatten(self, tensor):
-        tensors, s = [], 0
-        for raw_tensor in self._tensors:
-            length = raw_tensor.numel()
-            x = torch.reshape(tensor[s : s + length], shape=raw_tensor.shape)
-            tensors.append(x)
-            s += length
-        return tensors
-
-    def append(self, name, tensor, param_or_buffer):
-        if not isinstance(tensor, torch.Tensor):
-            raise TypeError(
-                "The input tensor must be torch.Tensor instead of {:}".format(
-                    type(tensor)
-                )
-            )
-        self._names.append(name)
-        self._tensors.append(tensor)
-        self._param_or_buffers.append(param_or_buffer)
-        assert name not in self._name2index, "The [{:}] has already been added.".format(
-            name
-        )
-        self._name2index[name] = len(self._names) - 1
-
-    def query(self, name):
-        if not self.has(name):
-            raise ValueError(
-                "The {:} is not in {:}".format(name, list(self._name2index.keys()))
-            )
-        index = self._name2index[name]
-        return self._tensors[index]
-
-    def has(self, name):
-        return name in self._name2index
-
-    def has_prefix(self, prefix):
-        for name, idx in self._name2index.items():
-            if name.startswith(prefix):
-                return name
-        return False
-
-    def numel(self):
-        total = 0
-        for tensor in self._tensors:
-            total += tensor.numel()
-        return total
-
-    def __len__(self):
-        return len(self._names)
-
-    def __repr__(self):
-        return "{name}({num} tensors)".format(
-            name=self.__class__.__name__, num=len(self)
-        )
+from .super_utils import IntSpaceType, BoolSpaceType
+from .super_utils import LayerOrder, SuperRunMode
+from .super_utils import TensorContainer
+from .super_utils import ShapeContainer
 
 
 class SuperModule(abc.ABC, nn.Module):
diff --git a/lib/xlayers/super_utils.py b/lib/xlayers/super_utils.py
new file mode 100644
index 0000000..6fc0b99
--- /dev/null
+++ b/lib/xlayers/super_utils.py
@@ -0,0 +1,222 @@
+#####################################################
+# Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2021.03 #
+#####################################################
+
+import abc
+import warnings
+from typing import Optional, Union, Callable
+import torch
+import torch.nn as nn
+from enum import Enum
+
+import spaces
+
+IntSpaceType = Union[int, spaces.Integer, spaces.Categorical]
+BoolSpaceType = Union[bool, spaces.Categorical]
+
+
+class LayerOrder(Enum):
+    """This class defines the enumerations for order of operation in a residual or normalization-based layer."""
+
+    PreNorm = "pre-norm"
+    PostNorm = "post-norm"
+
+
+class SuperRunMode(Enum):
+    """This class defines the enumerations for Super Model Running Mode."""
+
+    FullModel = "fullmodel"
+    Candidate = "candidate"
+    Default = "fullmodel"
+
+
+class ShapeContainer:
+    """A class to maintain the shape of each weight tensor for a model."""
+
+    def __init__(self):
+        self._names = []
+        self._shapes = []
+        self._name2index = dict()
+        self._param_or_buffers = []
+
+    @property
+    def shapes(self):
+        return self._shapes
+
+    def __getitem__(self, index):
+        return self._shapes[index]
+
+    def translate(self, tensors, all_none_match=True):
+        result = TensorContainer()
+        for index, name in enumerate(self._names):
+            cur_num = tensors[index].numel()
+            expected_num = self._shapes[index].numel()
+            if cur_num < expected_num or (
+                cur_num > expected_num and not all_none_match
+            ):
+                raise ValueError("Invalid {:} vs {:}".format(cur_num, expected_num))
+            cur_tensor = tensors[index].view(-1)[:expected_num]
+            new_tensor = torch.reshape(cur_tensor, self._shapes[index])
+            result.append(name, new_tensor, self._param_or_buffers[index])
+        return result
+
+    def append(self, name, shape, param_or_buffer):
+        if not isinstance(shape, torch.Size):
+            raise TypeError(
+                "The input tensor must be torch.Size instead of {:}".format(type(shape))
+            )
+        self._names.append(name)
+        self._shapes.append(shape)
+        self._param_or_buffers.append(param_or_buffer)
+        assert name not in self._name2index, "The [{:}] has already been added.".format(
+            name
+        )
+        self._name2index[name] = len(self._names) - 1
+
+    def query(self, name):
+        if not self.has(name):
+            raise ValueError(
+                "The {:} is not in {:}".format(name, list(self._name2index.keys()))
+            )
+        index = self._name2index[name]
+        return self._shapes[index]
+
+    def has(self, name):
+        return name in self._name2index
+
+    def has_prefix(self, prefix):
+        for name, idx in self._name2index.items():
+            if name.startswith(prefix):
+                return name
+        return False
+
+    def numel(self, index=None):
+        if index is None:
+            shapes = self._shapes
+        else:
+            shapes = [self._shapes[index]]
+        total = 0
+        for shape in shapes:
+            total += shape.numel()
+        return total
+
+    def __len__(self):
+        return len(self._names)
+
+    def __repr__(self):
+        return "{name}({num} tensors)".format(
+            name=self.__class__.__name__, num=len(self)
+        )
+
+
+class TensorContainer:
+    """A class to maintain both parameters and buffers for a model."""
+
+    def __init__(self):
+        self._names = []
+        self._tensors = []
+        self._param_or_buffers = []
+        self._name2index = dict()
+
+    def additive(self, tensors):
+        result = TensorContainer()
+        for index, name in enumerate(self._names):
+            new_tensor = self._tensors[index] + tensors[index]
+            result.append(name, new_tensor, self._param_or_buffers[index])
+        return result
+
+    def create_container(self, tensors):
+        result = TensorContainer()
+        for index, name in enumerate(self._names):
+            new_tensor = tensors[index]
+            result.append(name, new_tensor, self._param_or_buffers[index])
+        return result
+
+    def no_grad_clone(self):
+        result = TensorContainer()
+        with torch.no_grad():
+            for index, name in enumerate(self._names):
+                result.append(
+                    name, self._tensors[index].clone(), self._param_or_buffers[index]
+                )
+        return result
+
+    def to_shape_container(self):
+        result = ShapeContainer()
+        for index, name in enumerate(self._names):
+            result.append(
+                name, self._tensors[index].shape, self._param_or_buffers[index]
+            )
+        return result
+
+    def requires_grad_(self, requires_grad=True):
+        for tensor in self._tensors:
+            tensor.requires_grad_(requires_grad)
+
+    def parameters(self):
+        return self._tensors
+
+    @property
+    def tensors(self):
+        return self._tensors
+
+    def flatten(self, tensors=None):
+        if tensors is None:
+            tensors = self._tensors
+        tensors = [tensor.view(-1) for tensor in tensors]
+        return torch.cat(tensors)
+
+    def unflatten(self, tensor):
+        tensors, s = [], 0
+        for raw_tensor in self._tensors:
+            length = raw_tensor.numel()
+            x = torch.reshape(tensor[s : s + length], shape=raw_tensor.shape)
+            tensors.append(x)
+            s += length
+        return tensors
+
+    def append(self, name, tensor, param_or_buffer):
+        if not isinstance(tensor, torch.Tensor):
+            raise TypeError(
+                "The input tensor must be torch.Tensor instead of {:}".format(
+                    type(tensor)
+                )
+            )
+        self._names.append(name)
+        self._tensors.append(tensor)
+        self._param_or_buffers.append(param_or_buffer)
+        assert name not in self._name2index, "The [{:}] has already been added.".format(
+            name
+        )
+        self._name2index[name] = len(self._names) - 1
+
+    def query(self, name):
+        if not self.has(name):
+            raise ValueError(
+                "The {:} is not in {:}".format(name, list(self._name2index.keys()))
+            )
+        index = self._name2index[name]
+        return self._tensors[index]
+
+    def has(self, name):
+        return name in self._name2index
+
+    def has_prefix(self, prefix):
+        for name, idx in self._name2index.items():
+            if name.startswith(prefix):
+                return name
+        return False
+
+    def numel(self):
+        total = 0
+        for tensor in self._tensors:
+            total += tensor.numel()
+        return total
+
+    def __len__(self):
+        return len(self._names)
+
+    def __repr__(self):
+        return "{name}({num} tensors)".format(
+            name=self.__class__.__name__, num=len(self)
+        )