the only one it seems is " cn " but my advice is to check other successful chinese d-tubers using that hashtag on steemit and see what other hashtags they use.

Also subscribe like and comment on their videos and blogs in chinese do that on dtube and dlive and steemit
you will form bonds with them or at the very least they will know you exist and what you do.

you could also create your own hashtag to mirror steemit like cn-life or cn-business like the koreans used kr and created a host of new hashtags to have their own little microcosm

your lucky that china is just stating to blow up theres is still only one hashtag so create your own you might be the first to lead the way and gain recognition.

Good luck and stay hungry!