A man from Wenzhou was hit on the head with a hammer and emergency medical assistance was sent to a neighbor. According to the injured brother, in April, the child of the criminal put a stone in the drain pipe, and the stone penetrated the knee of the pipe on the first floor along the drain pipe, resulting in a loss of almost 10,000 yuan, the owner of the first floor must pay 4,000 yuan, and the criminals are willing to pay 2,000 yuan