According to TechFlow, Lookonchain monitoring shows that the address starting with 0x1111 uses circular lending to pledge ETH in Aave to borrow WBTC, and then trades WBTC for ETH to repeat the above process. In total, 44,956 Ethereum (worth about 73.5 million US dollars) are pledged and 2,088 WBTC (worth about 58.3 million US dollars) are borrowed.