Update README.md

Author: Snailclimb

README.md

@@ -210,6 +210,7 @@
 
 - [5面阿里,终获offer(2018年秋招)](docs/essential-content-for-interview/BATJrealInterviewExperience/5面阿里,终获offer.md)
 - [蚂蚁金服2019实习生面经总结(已拿口头offer)](docs/essential-content-for-interview/BATJrealInterviewExperience/蚂蚁金服实习生面经总结(已拿口头offer).md)
+- [2019年蚂蚁金服、头条、拼多多的面试总结](docs/essential-content-for-interview/BATJrealInterviewExperience/2019alipay-pinduoduo-toutiao.md)
 
 ## 工具