1, Bitter smart lock (Guangdong Bitter Security System Co., Ltd. 2 1 has been focusing on the production and research of smart locks for many years, and Bitter smart locks have run trouble-free for millions of times, reaching the ANSI/BHMA standard).

2. Ousheng ("OLSSEN Ousheng" brand, a popular brand in China, has passed the 45-category full registration of the State Trademark Office, and completed the overseas trademark registration of Italian, German, Egyptian, Australian and other 13 countries. Products have been recognized and trusted by customers at home and abroad, and the market share and occupation rate have gradually increased, ranking among the forefront of the industry. )。

3. Huafeng (a hardware enterprise specializing in the production of all kinds of locks).