Huobi’s mining arm recorded a 547% surge in operating revenue in 2019 after the business was launched in March 2018
Source: https://cointelegraph.com/news/huobis-mining-arm-records-547-surge-in-operating-revenue-in-2019
Huobi’s Mining Arm Records 547% Surge in Operating Revenue in 2019
March 19, 2020
CoinTelegraph