a joint trademark is a number of similar trademarks used by the same trademark owner on the same or similar goods. Among these similar trademarks, the first registered or mainly used trademark is original trademark, and the rest are joint trademarks of this trademark. For example, the original trademark of an enterprise is "Peony", and its joint trademarks are "Bai Mudan", "Red Peony" and "Black Peony".

For example, Huawei Technologies Co., Ltd. registered in 42 categories: Huawei, Huawei Games, Huawei Digital, Huawei Services and Huawei Training are all joint trademarks.