And it's a huge increase for the CSL - US$1.25 billion for five years: https://www.soccerex.com/news/2015/09/ti’ao-power-wins-chinese-super-league-broadcast-rights
I could not open the link, does the deal include D2? 250M per year is not bad. 15.5 mil per team per year.
Here you go: http://www.chinadaily.com.cn/sports/2015-10/28/content_22303384.htm Top flight only as far as I can tell. And this was done before most big names were added in the winter transfer window. I would expect the CSL to get something even better in 2020.