What does this sentence mean?

In the past, people were poor Many people only wear cotton-padded clothes and trousers, and there are no clothes suitable for spring, so they have been wearing cotton-padded clothes and trousers since winter until the heat is unbearable. This time is probably around Qingming. "If you don't take off your cotton coat and trousers in the Qing Dynasty, you will become a rabbit when you die." . This is a superstitious statement.