升级普及方法

http://mp.weixin.qq.com/s?__biz=MzA5MTU5MzkzOQ==&mid=403017638&idx=1&sn=fc68f15b3dc1be7377ebb5c5379bbdd6&scene=24&srcid=0520VhDLZZwhmaLuDOA5K0GL#wechat_redirect{:6_161:}{:6_161:}