How to unsubscribe

Dear all, Sorry to bother you! Could you tell me how to subscribe the list? Thanks so much! Li Bing _.--"""--._ .' '-. `. __/__(-. `\

How to unsubscribe

Dear all, Sorry to bother you! Could you tell me how to subscribe the list? Thanks so much! Li Bing _.--"""--._ .' '-. `. __/__(-. `\