Five of China's biggest mining pools — AntPool, F2Pool, BTCChina, BW Mining, and Huobi —
have mutually agreed to a raise of the block size limit to 8 MB. They collectively rejected
Bitcoin core developer Gavin Andresen's proposal to raise the limit from 1 MB to 20 MB,
and instead presented a compromise.

BTW, these pools jointly account for some 55% to 60% of all hashing power on the Bitcoin network.