Really hard to research that one because of the bad translation. Team, website and whitepaper looks solid even if I can't understand it 100%. According to the chaper 5.4 of their whitepaper 1 BTC = 80,000 BUC which makes the 500 BUCC worth about $70. I still not share it on Telegram or Twitter because I'm not sure if everything is correct because I can't speak Chinese. Also you have to download the app to receive the tokens. I hope they'll release an iOS version March 7th, too.
Estimated Value : $1.5https://www.bitun.io/download/android.html?vv=20180301