Hunan police have announced a major case of cross-border telecommunications fraud using cryptocurrencies. The case involves leasing communication tools to overseas fraud gangs, involving more than 4 million yuan. The address of the criminal gang leader Xia's Ouyi wallet shows that the cryptocurrency used to settle the fraud commission is as high as 9 million yuan, nearly 10 million yuan. Gang members mainly trade through the virtual currency USDT to avoid traditional financial supervision.