Maybe just ask?

(Check back on this post, I'll be adding links as I find them for a while...)

OKCoin Contact Info

https://www.okcoin.cn/tcat-6-601.html

https://www.okcoin.cn/question/userSupport.do

https://twitter.com/OKcoin

Huobi Contact Info

https://www.huobi.com/about/contact_us

https://www.huobi.com/about/manage_team

https://twitter.com/huobicom?lang=en

Allen Scott of Coin Telegraph knows how to get in touch with Huobi management and has interviewed them several times, maybe he would do a referral....after writing an article on the Lisk ICO, maybe?

http://cointelegraph.com/authors/allen_scott