Hi @song-x, 你好. Welcome to #steemit. Probably you have a lot of questions about Steemit and the easiest way to get proper answer is from reading the Official website FAQ:
(https://steemit.com/faq.html).
始终把你的学习放在第一位。 当你自由时，只发布在这里。
Have fun exploring and posting your experiences in Steemit. Enjoy!
嗯,我知道了,谢谢指点!