At the first moment I saw Kotlin, I knew this should be the one I love and should switch to from Java. So I have been working on a series of videos to introduce Kotlin in Chinese, and posted it on my Github as Kotlin-Tutorials.
Kotlin has not been widely used in China yet, I just want to help to make it more popular.
I also opened an account in WeChat, and I will push news or articles (In Chinese) to my subscribers every Monday. It is a great honour if you subscribe it.