Many. According to inquiries from Lanzhou Zhongbang Wire and Cable Group Co., Ltd., there are more fake Zhongbang wires and wires on the market now than real ones, and the fake wires also have the same markings as the real wires. Since twisted pairs are difficult to replace once laid, it is necessary to strictly control the quality of the wires, choose products from well-known manufacturers, and purchase from reputable dealers.