Why are there barely any pure crypto coins that are Chinese? I means coins like Vertcoin, Litecoin, Viacoin... But there are a lot of platforms instead...
Are they just doing "serious" stuff or weren't they involved in crypto before Ethereum became big?
There's a lot more than just the ones you mentioned. Most of them seem to be based around Ethereum though. Also, they were involved. There were a bunch of mining farms in China from the beginning. Mainly because of the cheap labor and electricity.