I have never heard of it but when you link it to China I am not a big fan of Chinese websites , neither in mining neither in trading. There must be something fishy about such website as I have never seen anything for free from China, and non fee activity sounds strange to me when it comes from a Chinese company.
Have you heard of Jubi? It used to be the largest altcoin exchange in China. CoinEgg is located in UK. It looks like a transnational cooperation.