add gr variable

app.py

@@ -1,4 +1,5 @@
 from transformers import AutoModel, AutoTokenizer
+import gradio as gr
 tokenizer = AutoTokenizer.from_pretrained("THUDM/chatglm2-6b", trust_remote_code=True)
 model = AutoModel.from_pretrained("THUDM/chatglm2-6b", trust_remote_code=True).half().cuda()
 model = model.eval()
@@ -11,7 +12,10 @@ def beginchat(input, history=None):
 
 
 with gr.Blocks() as chatglm2bot:
-    gr.Markdown('''## ChatGLM2-6B - chatbot demo''')
+    gr.Markdown('''## ChatGLM2-6B - chatbot demo
+    Glm-130b: An open bilingual pre-trained model
+    Author: Zeng, Aohan and Liu, Xiao and Du, Zhengxiao and Wang, Zihan and Lai, Hanyu and Ding, Ming and Yang, Zhuoyi and Xu, Yifan and Zheng, Wendi and Xia, Xiao and others
+    Paper: arXiv preprint arXiv:2210.02414''')
     state = gr.State([])
     chatbot = gr.Chatbot([], elem_id="chatbot").style(height=400)
     with gr.Row():