diff --git a/readme.md b/readme.md
index e53036f4..ede8c990 100644
--- a/readme.md
+++ b/readme.md
@@ -21,20 +21,20 @@
     - [1.0.5 深度学习模型搭建基础](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.0%20%E6%9C%BA%E5%99%A8%E5%AD%A6%E4%B9%A0%E5%9F%BA%E7%A1%80/1.0.5%20%E6%B7%B1%E5%BA%A6%E5%AD%A6%E4%B9%A0%E6%A8%A1%E5%9E%8B%E6%90%AD%E5%BB%BA%E5%9F%BA%E7%A1%80.md)
   
   - **1.1 基础推荐算法**
-      - [1.1.1 推荐系统概述](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.1%20%E6%A6%82%E8%BF%B0.md)
-      - [1.1.2 协同过滤](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.2%20%E5%8D%8F%E5%90%8C%E8%BF%87%E6%BB%A4.md)
-      - [1.1.3 矩阵分解](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.3%20%E7%9F%A9%E9%98%B5%E5%88%86%E8%A7%A3.md)
-      - [1.1.4 FM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.4%20FM.md)
-      - [1.1.5 GBDT+LR](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.6%20GBDT%2BLR.md)
+      - [1.1.1 推荐系统概述](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%20%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.1%20%E6%A6%82%E8%BF%B0.md)
+      - [1.1.2 协同过滤](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%20%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.2%20%E5%8D%8F%E5%90%8C%E8%BF%87%E6%BB%A4.md)
+      - [1.1.3 矩阵分解](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%20%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.3%20%E7%9F%A9%E9%98%B5%E5%88%86%E8%A7%A3.md)
+      - [1.1.4 FM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%20%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.4%20FM.md)
+      - [1.1.5 GBDT+LR](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.1%20%E5%9F%BA%E7%A1%80%E6%8E%A8%E8%8D%90%E7%AE%97%E6%B3%95/1.1.5%20GBDT%2BLR.md)
   
   - **1.2 深度推荐模型**
-      - [1.2.1 NeuralCF](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.1%20NeuralCF.md)
-      - [1.2.2 Deep Crossing](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.2%20DeepCrossing.md)
-      - [1.2.3 PNN](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.3%20PNN.md)
-      - [1.2.4 Wide&Deep](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.4%20Wide%26Deep.md)
-      - [1.2.5 DeepFM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.5%20DeepFM.md)
-      - [1.2.6 Deep&Cross](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.7%20DCN.md)
-      - [1.2.7 NFM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E7%BB%84%E5%90%88%E7%9A%84%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.6%20NFM.md)
+      - [1.2.1 NeuralCF](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.1%20NeuralCF.md)
+      - [1.2.2 Deep Crossing](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.2%20DeepCrossing.md)
+      - [1.2.3 PNN](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.3%20PNN.md)
+      - [1.2.4 Wide&Deep](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.4%20Wide%26Deep.md)
+      - [1.2.5 DeepFM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.5%20DeepFM.md)
+      - [1.2.6 Deep&Cross](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.7%20DCN.md)
+      - [1.2.7 NFM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.6%20NFM.md)
       - [1.2.8 AFM](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.8%20AFM.md)
       - [1.2.9 DIN](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.9%20DIN.md)
       - [1.2.10 DIEN](https://github.com/datawhalechina/fun-rec/blob/master/docs/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%E6%8E%A8%E8%8D%90%E7%B3%BB%E7%BB%9F%E5%9F%BA%E7%A1%80/1.2%20%E6%B7%B1%E5%BA%A6%E6%8E%A8%E8%8D%90%E6%A8%A1%E5%9E%8B/1.2.10%20DIEN.md)