We used uncensored stuff to replace high-bitrate stuff's mosaic area, and removed all hardsubs.
Coolmic's uncensored stuff is a $5 trash, which means that to achieve the best performance, we should use high-bitrate stuff as a foundation, replace the mosaic areas with Coolmic stuff, and proceed with subsequent processing based on this.
For some hardsubs, we made functions to remove them perfectly. And for the others, Luchito helped us to fix them. Thanks for his help!