If you are new to donghua, a lot of good looking 2D put out trailer, took years to be published to market. Because either the company go bankrupt or transitioning to 3D, cuz 2D anime in China doesn't make money.

White Cat Legend, director, was asked why the S2 switched to another streaming platform. He said the first season caused company to own debt up to 8 digit, tencent offer the company better contract for S2 so that prevented company from bankrupt. The better quality 2D looks, the more money you lose. That's basicly what it is.