“Splitboarding & Backcountry touring” in Chinese (it would be better to add more explanation): 穿分离板的登山滑雪 or 穿分离板滑野雪（就是竖着劈成两半的单板，登山的时候拆开，像双板一样穿在脚上，方便行走。登顶之后再拼起来，一路单板下山）。
for some other popular social media in China, you may try below:
https://www.weibo.com/ (same as Twitter outside)
https://www.zhihu.com/ (same as Quora outside)
for App in China, you may use:
WeChat（微信） （same as LINE, Telegram, Messenger outside)
抖音 (same as TikTok outside)
All above web or app, MAY limit the contents for oversea user, so if you are outside China, you MAY use VPN to see more contents.
BTW, do you have Instagram/Twitter/Facebook account? feel free to share with us, you may also email me: firstname.lastname@example.org if you like.