March's 2.65M new subscribers at China Mobile is almost certainly a broadband record. I don't remember anything close. I checked 10 years of data from China Telecom, by far the world's largest broadband provider and didn't find a peer. Most of them are on fiber. China Mobile consolidated wireline subsidiary China Tietong and now is going full speed ahead. China Telecom added 3m to 116M; China Unicom 1.1M to 73M. Add 18M cable modems and a few small players and the current Chinese subscriber base is over 270M.
Most new Chinese connections are on fiber: China added 50M fiber subs in 2015 and entered 2016 with 130M fibered. China Mobile consolidated wireline subsidiary China Tietong and now is going full speed ahead. With 800M mobile customers, they have plenty of prospects.
Update 7/22 Removed total of fiber customers. Looking at new data, I'm not sure how many are fiber home and how many fiber/DSL and didn't want to provide a figure.