; There is only one kind of authentic: "Yongtong" brand wire produced by "Hangzhou Zhongce Wire and Cable Co., Ltd.". It is what everyone calls the China policy line, and nothing else. Their differences are as follows: Hangzhou Cable Factory was established in 1958. Now is a booming era, and the word shanzhai has not yet appeared. 1July, 983, Yongtong trademark of cable factory was formally established. 1June, 1992, the company was renamed as Zhejiang zhongce cable co., ltd, and it is necessary to say something here. Zhejiang Zhongce Cable Co., Ltd. produces Yongtong brand wire instead of Zhongce brand wire, which is a god-like existence in the hearts of ordinary people and in the hands of the old foundation industry. In April 2000, it was renamed as "Hangzhou Qiandao Lake Yongtong Cable Co., Ltd. and Hangzhou Cable Co., Ltd. (the latter is responsible for the low smoke line, and its address is Golf Road, Fuyang District, Hangzhou). After so many years, the people still think that the "Yongtong" line is called the "Zhongce" line. Ten years of habits just can't be changed. But the problem is that in 2009, a home appliance company in Xiasha registered Zhongce as its own product trademark. It is also because "Yongtong" company has changed its name before, ignoring its original company name "Zhejiang Zhongce Cable Co., Ltd.". We don't talk about commercial activities here, only about electric wires, so since 2009, the "Zhongce" line (in fact, Yongtong line) mentioned by ordinary people is not the original "Zhongce" line, and the trademark of Zhongce has been registered by other businesses. Gui Li became the real jy of Li Kui. So after 2009, if you want to buy Zhongce Line, the merchants will give you Zhongce Line, but what you get is not Zhongce Line passed down from generation to generation by ordinary people. To sum up, in primitive times, Zhongce Factory produced Yongtong Line, but people used to call it Zhongce Line (just like everyone has a nickname). In modern times, Zhongce Factory was renamed, and another local enterprise took the opportunity to register Zhongce as its own wire trademark. Therefore, the so-and-so Zhongce, Zhongce Moumou, Yongtong Zhongce, Zhongce Yongtong, so-and-so Yongtong and Yongtong Moumou used in your home decoration are not "Yongtong" lines, they are all knockoffs and have no products. The "Zhongce" wire rod sold by Zhongce Company turned into Li Kui jy, which has nothing to do with the "Zhongce" wire rod mentioned by the older generation.