How to send emails and text messages to friends abroad?

1, see if her email address is from China or Japanese website.

See if his computer has Chinese display.

If there is no problem with the above two items, you can send them in Chinese.

A Japanese friend of mine is the mailbox of a Japanese website, and she often has problems sending Chinese.

I suggest using English or Pinyin (if she knows Chinese). Although pinyin looks difficult, it won't be a problem. My friends who know Chinese in Korea and Japan often send emails in Pinyin.