Guli is the most representative lock brand of Zhongshan Xiaolan in the "Southern Lock City", in the eighties, its production of spherical door locks were exported to foreign countries in large quantities, and in 2003 it was the first position in the national lock market share. The brand history of Guli can be traced back to 1969, and it has produced the well-known "diamond brand" locks in the Pearl River Delta region. In 1992, Guangdong Guli Lock Group Co., Ltd. was established, and "Diamond Brand" was renamed "Guli Brand".

In 2001, Guli was incorporated into the ASSA ABLOY Group, one of the world's top ten security companies, and Guli became the first wholly foreign-owned enterprise in the domestic lock industry and the largest lock manufacturer of ASSA ABLOY Group in Asia. Due to the large number of products exported, Guli has also become one of the few enterprises in China that can design and manufacture security hardware products in strict accordance with the American standard ANSI, European standard EN, Australian standard, New Zealand standard, national standard and public security anti-theft standard, as well as the American UL fire protection standard and Chinese fire protection standard.

Guli's R&D strength is strong, and its laboratory is the first in China, and it is currently the only lock-making enterprise laboratory that has been certified by the national laboratory. As a brand launched by an international group for the Chinese market, Guli Door Lock is processed and polished with high-precision machine tools imported from Germany, and the weight of the thickened panel is higher than that of other brands on the market at the same price.

Guli has a rich product line, including building door control products, electronic door control products and ancillary hardware products, modern hardware processing technology and international advanced production lines, so that the quality of Guli door locks is very stable, and the safety factor is high. The products are of high and low grade, with sufficient materials and exquisite workmanship.

The fly in the ointment is that the style of the Guli door lock is more decent, not as fashionable and varied as other brands, and most of its materials are zinc alloy, the price is below 200 yuan, only the bathroom lock is made of stainless steel, and the price is within 100 yuan.