Does Shandong Jiuyang Co., Ltd. have a branch in Foshan, Guangdong?
Jiuyang Company doesn't have Yang trademark, but you bought counterfeit goods produced by other small manufacturers. Because the trademark can be marked TM in the upper right corner as long as it gets the acceptance notice, but if the trademark is unqualified, it will be rejected after two and a half years. The quality of the electrical products you bought is definitely not as good as that of Jiuyang, but it is not necessarily defective. You can try.