I heard a real case: 21 years ago, a boss of a listed company used company funds to buy a large number of mining machines in the name of a data center. The data center was naturally a cost center and did not generate any revenue. The company paid for the electricity cost and all the coins mined were deposited into the boss's own wallet. Only after knowing this did I understand why mining was banned in 2021, that is, all loopholes under the foreign exchange control system should be blocked.