Today, the letter issuance will announce the announcement of the mining pool business on July 20. In this regard, the coin letter COO Xiong Yue said: 1. Since the establishment of the coin-age mine pool, it has almost always been a private pool, and other miners have less computing power. As the competition in the mining industry becomes more and more fierce, the proportion of self-owned computing power will inevitably become less; 2. The bitcoin mining pool is now low in overall industry profit margin, and the small mining pool with low computing power share has a high risk of losing money; 3. Only the mining pool business is closed and other businesses are normal.