ok,many thanks for your help.now i know how to do that , wish you have a nice day i will add you okay ?

Hello Bella, if you click on someone's photo/avatar you will go to their profile and you can click on the orange button - add as friend. I would send them a nice message too, to introduce yourself. Hope this helps Bob

you can send anyone message without limit. such as "I’m Eli from China. Now I’m living in Beijing. My english is on intermediate level and I’m eager to talk to you. Expect to talk to you. My skype address is eli-wong123 and wechat id is wangzhenpu001"

homepage-> community-> language friends, then search in that page.