my friends in wuhan

My friends are far away from me in Wuhan, and i don't know how to keep in touch with them, because our lives are completely different!

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I don't know what you wanted, because you haven't asked for any particular help. So, I corrected the English in your sentence. I would add that i'd probably say: "My friends are far away in Wuhan . . ."--that they are far away from you is implied in the statement.

Because you have communicated via the Internet as you have here, you know how to sue a computer. I'll assume so do they.

Also you can use a video program like Skype or Facebook or any of the social media website to be in touch. So can they.

so what i can use is to make use of social media? But i think that traveling to their cities will be a good way. But that's really inconvenient, i think.

Look, there are only three ways to "keep in touch" with far away friends. You can visit (which you say is inconvenient), you can pick up a telephone and call every now and then (you do have a phone, right?) or you can mail/email/use social media to keep in touch. Those are your choices.

ok,you are very considerate. Thank you. Now i think that socical media is important. I will try it.