Asked questions from netizens, "Why are there so many unknown computing powers?" Liu Chang, a Ph.D. in economics at Peking University and founder of Zhimi University, replied that there are five kinds of situations: 1) The new mining pool or sporadic computing power does not label itself. This is a common situation; 2) the large mining pool is unwilling to be known by the belief that it is digging the currency that does not conform to the belief; 3) testing the new mining mechanism, and does not want to let people know; 4) the ambush is ready to launch an attack. Recently, BCH's unknown computing power mainly comes from coin printing. They oppose BCH and are also working as machine gun pools. However, as a top mine pool, it will not launch attacks to damage the common interests of all Sha256 miners. Previously, Twitter user @Notgrubles said that an unknown BCH miner apparently controlled 50% of the token's computing power within 24 hours.