diff --git a/examples/linkproppred/tkgl-icews/cen.py b/examples/linkproppred/tkgl-icews/cen.py
index 97d0055..6fb5ace 100644
--- a/examples/linkproppred/tkgl-icews/cen.py
+++ b/examples/linkproppred/tkgl-icews/cen.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNCEN
 from tgb.utils.utils import set_random_seed, split_by_time,  save_results
-from tgb_modules.tkg_utils import get_args_cen, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_cen, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 
diff --git a/examples/linkproppred/tkgl-icews/regcn.py b/examples/linkproppred/tkgl-icews/regcn.py
index b2e49e2..2785ade 100644
--- a/examples/linkproppred/tkgl-icews/regcn.py
+++ b/examples/linkproppred/tkgl-icews/regcn.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNREGCN
 from tgb.utils.utils import set_random_seed, split_by_time, save_results
-from tgb_modules.tkg_utils import get_args_regcn, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_regcn, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 import json
diff --git a/examples/linkproppred/tkgl-polecat/cen.py b/examples/linkproppred/tkgl-polecat/cen.py
index b604927..4e6a219 100644
--- a/examples/linkproppred/tkgl-polecat/cen.py
+++ b/examples/linkproppred/tkgl-polecat/cen.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNCEN
 from tgb.utils.utils import set_random_seed, split_by_time,  save_results
-from tgb_modules.tkg_utils import get_args_cen, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_cen, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 
diff --git a/examples/linkproppred/tkgl-polecat/regcn.py b/examples/linkproppred/tkgl-polecat/regcn.py
index 80e3277..6014d68 100644
--- a/examples/linkproppred/tkgl-polecat/regcn.py
+++ b/examples/linkproppred/tkgl-polecat/regcn.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNREGCN
 from tgb.utils.utils import set_random_seed, split_by_time, save_results
-from tgb_modules.tkg_utils import get_args_regcn, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_regcn, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 import json
diff --git a/examples/linkproppred/tkgl-smallpedia/cen.py b/examples/linkproppred/tkgl-smallpedia/cen.py
index 0fa5829..03f3b0f 100644
--- a/examples/linkproppred/tkgl-smallpedia/cen.py
+++ b/examples/linkproppred/tkgl-smallpedia/cen.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNCEN
 from tgb.utils.utils import set_random_seed, split_by_time,  save_results
-from tgb_modules.tkg_utils import get_args_cen, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_cen, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 
diff --git a/examples/linkproppred/tkgl-smallpedia/regcn.py b/examples/linkproppred/tkgl-smallpedia/regcn.py
index 0513f6d..8236319 100644
--- a/examples/linkproppred/tkgl-smallpedia/regcn.py
+++ b/examples/linkproppred/tkgl-smallpedia/regcn.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNREGCN
 from tgb.utils.utils import set_random_seed, split_by_time, save_results
-from tgb_modules.tkg_utils import get_args_regcn, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_regcn, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 import json
diff --git a/examples/linkproppred/tkgl-wikidata/regcn.py b/examples/linkproppred/tkgl-wikidata/regcn.py
index 19aea92..d4282d4 100644
--- a/examples/linkproppred/tkgl-wikidata/regcn.py
+++ b/examples/linkproppred/tkgl-wikidata/regcn.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNREGCN
 from tgb.utils.utils import set_random_seed, split_by_time, save_results
-from tgb_modules.tkg_utils import get_args_regcn, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_regcn, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 import json
diff --git a/examples/linkproppred/tkgl-yago/cen.py b/examples/linkproppred/tkgl-yago/cen.py
index 4fae465..46caeb5 100644
--- a/examples/linkproppred/tkgl-yago/cen.py
+++ b/examples/linkproppred/tkgl-yago/cen.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNCEN
 from tgb.utils.utils import set_random_seed, split_by_time,  save_results
-from tgb_modules.tkg_utils import get_args_cen, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_cen, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 
diff --git a/examples/linkproppred/tkgl-yago/regcn.py b/examples/linkproppred/tkgl-yago/regcn.py
index ff502b1..29206ff 100644
--- a/examples/linkproppred/tkgl-yago/regcn.py
+++ b/examples/linkproppred/tkgl-yago/regcn.py
@@ -20,7 +20,8 @@
 sys.path.append(tgb_modules_path)
 from tgb_modules.rrgcn import RecurrentRGCNREGCN
 from tgb.utils.utils import set_random_seed, split_by_time, save_results
-from tgb_modules.tkg_utils import get_args_regcn, build_sub_graph, reformat_ts
+from tgb_modules.tkg_utils import get_args_regcn, reformat_ts
+from tgb_modules.tkg_utils_dgl import build_sub_graph
 from tgb.linkproppred.evaluate import Evaluator
 from tgb.linkproppred.dataset import LinkPropPredDataset 
 import json
diff --git a/tgb_modules/tkg_utils_dgl.py b/tgb_modules/tkg_utils_dgl.py
new file mode 100644
index 0000000..bcc64b8
--- /dev/null
+++ b/tgb_modules/tkg_utils_dgl.py
@@ -0,0 +1,48 @@
+
+import dgl
+import torch
+import numpy as np
+
+
+def build_sub_graph(num_nodes, num_rels, triples, use_cuda, gpu, mode='dyn'):
+    """
+    https://github.com/Lee-zix/CEN/blob/main/rgcn/utils.py
+    :param node_id: node id in the large graph
+    :param num_rels: number of relation
+    :param src: relabeled src id
+    :param rel: original rel id
+    :param dst: relabeled dst id
+    :param use_cuda:
+    :return:
+    """
+    def comp_deg_norm(g):
+        in_deg = g.in_degrees(range(g.number_of_nodes())).float()
+        in_deg[torch.nonzero(in_deg == 0).view(-1)] = 1
+        norm = 1.0 / in_deg
+        return norm
+
+    src, rel, dst = triples.transpose()
+    if mode =='static':
+        src, dst = np.concatenate((src, dst)), np.concatenate((dst, src))
+        rel = np.concatenate((rel, rel + num_rels))
+    g = dgl.DGLGraph()
+    g.add_nodes(num_nodes)
+    #g.ndata['original_id'] = np.unique(np.concatenate((np.unique(triples[:,0]), np.unique(triples[:,2]))))
+    g.add_edges(src, dst)
+    norm = comp_deg_norm(g)
+    #node_id =torch.arange(0, g.num_nodes(), dtype=torch.long).view(-1, 1) #updated to deal with the fact that ot only the first k nodes of our graph have static infos
+    node_id = torch.arange(0, num_nodes, dtype=torch.long).view(-1, 1)
+    g.ndata.update({'id': node_id, 'norm': norm.view(-1, 1)})
+    g.apply_edges(lambda edges: {'norm': edges.dst['norm'] * edges.src['norm']})
+    g.edata['type'] = torch.LongTensor(rel)
+
+
+    uniq_r, r_len, r_to_e = r2e(triples, num_rels)
+    g.uniq_r = uniq_r
+    g.r_to_e = r_to_e
+    g.r_len = r_len
+
+    if use_cuda:
+        g = g.to(gpu)
+        g.r_to_e = torch.from_numpy(np.array(r_to_e))
+    return g