diff --git a/graph/component/categorize.py b/graph/component/categorize.py
index d18cab6fd..c9ef19164 100644
--- a/graph/component/categorize.py
+++ b/graph/component/categorize.py
@@ -43,7 +43,7 @@ class CategorizeParam(GenerateParam):
     def get_prompt(self):
         cate_lines = []
         for c, desc in self.category_description.items():
-            for l in desc["examples"].split("\n"):
+            for l in desc.get("examples", "").split("\n"):
                 if not l: continue
                 cate_lines.append("Question: {}\tCategory: {}".format(l, c))
         descriptions = []
diff --git a/rag/nlp/term_weight.py b/rag/nlp/term_weight.py
index 720087acc..34765feaf 100644
--- a/rag/nlp/term_weight.py
+++ b/rag/nlp/term_weight.py
@@ -107,7 +107,7 @@ class Dealer:
                 if re.match(p, t):
                     tk = "#"
                     break
-            tk = re.sub(r"([\+\\-])", r"\\\1", tk)
+            #tk = re.sub(r"([\+\\-])", r"\\\1", tk)
             if tk != "#" and tk:
                 res.append(tk)
         return res