diff --git a/hanlp/components/ner/transformer_ner.py b/hanlp/components/ner/transformer_ner.py
index 2579f0d32..15ee0585f 100644
--- a/hanlp/components/ner/transformer_ner.py
+++ b/hanlp/components/ner/transformer_ner.py
@@ -60,8 +60,7 @@ def tag_to_span(self, batch_tags, batch):
         for tags, tokens in zip(batch_tags, sents):
             if dict_whitelist:
                 for start, end, label in dict_whitelist.tokenize(tokens):
-                    if (tags[start].startswith('B') or tags[start].startswith('S')) and (
-                            tags[end - 1].startswith('E') or tags[end - 1].startswith('S')):
+                    if (not tags[start][0] in 'ME') and (not tags[end - 1][0] in 'BM'):
                         if end - start == 1:
                             tags[start] = 'S-' + label
                         else:
diff --git a/hanlp/version.py b/hanlp/version.py
index 661632937..77c220a4e 100644
--- a/hanlp/version.py
+++ b/hanlp/version.py
@@ -2,5 +2,5 @@
 # Author: hankcs
 # Date: 2019-12-28 19:26
 
-__version__ = '2.1.0-alpha.36'
+__version__ = '2.1.0-alpha.37'
 """HanLP version"""
diff --git a/plugins/hanlp_demo/hanlp_demo/zh/demo_ner_dict.py b/plugins/hanlp_demo/hanlp_demo/zh/demo_ner_dict.py
new file mode 100644
index 000000000..4d93e0951
--- /dev/null
+++ b/plugins/hanlp_demo/hanlp_demo/zh/demo_ner_dict.py
@@ -0,0 +1,12 @@
+# -*- coding:utf-8 -*-
+# Author: hankcs
+# Date: 2021-04-29 11:06
+import hanlp
+
+HanLP = hanlp.load(hanlp.pretrained.mtl.CLOSE_TOK_POS_NER_SRL_DEP_SDP_CON_ELECTRA_BASE_ZH)
+HanLP['ner/msra'].dict_whitelist = {'午饭后': 'TIME'}
+doc = HanLP('2021年测试高血压是138，时间是午饭后2点45，低血压是44', tasks='ner/msra')
+doc.pretty_print()
+print(doc['ner/msra'])
+
+# See https://hanlp.hankcs.com/docs/api/hanlp/components/mtl/tasks/ner/tag_ner.html