Fix the missing Chinese character bug (#2497)

modules/RWKV.py

@@ -87,7 +87,9 @@ class RWKVModel:
             while len(tokens) > 0:
                 out, state = self.model.forward(tokens[:args.chunk_len], state)
                 tokens = tokens[args.chunk_len:]
-
+            if i == 0:
+                begin_token= len(all_tokens)
+                last_token_posi=begin_token
             # cache the model state after scanning the context
             # we don't cache the state after processing our own generated tokens because
             # the output string might be post-processed arbitrarily. Therefore, what's fed into the model
@@ -116,13 +118,13 @@ class RWKVModel:
                 occurrence[token] += 1
 
             # output
-            tmp = self.pipeline.decode([token])
+            tmp = self.pipeline.decode(all_tokens[last_token_posi:])
             if '\ufffd' not in tmp:  # is valid utf-8 string?
                 if callback:
                     callback(tmp)
                     
                 out_str += tmp
-
+                last_token_posi = begin_token + i + 1
         return out_str