(2013) · The Start 

Thirteen returning migrant workers started the business, and DeLong was officially established in Hongping Industrial Park, XingLong Town, Meitan County, Zunyi City, Guizhou Province, China. Meanwhile, the company was awarded the county-level honorary title of “Entrepreneurship Site for Returning Migrant Workers” from the local government.

 (2014–2018) · Expansion 

DeLong introduced technology, capital, and talent for restructuring, and purchased advanced production equipment. It obtained the ISO 9001:2008 Quality Management System Certification, and was awarded the county-level honorary titles of “Entrepreneurship Demonstration Enterprise for Returned Migrant Workers” and “Sunshine Project Employment Placement Site.”

 (2019–2023) · Breakthrough 

The company established a Product R&D Leading Group and obtained 2 invention patents and 18 utility model patents. Then, DeLong launched the Internal Combustion Engine Valve Expansion and Upgrading Project, completed the registration as a “Foreign Trade Operator” and “Customs Consignee and Consignor for Import and Export Goods,” achieved its first foreign trade export, and expanded its customer base to more than 40 clients. DeLong was also awarded the provincial-level title of “Employment Poverty Alleviation Workshop” and the honorary title of “Healthy Enterprise of Zunyi City.”

 (2023–2026) ·New Journey 

DeLong completed the Internal Combustion Engine Valve Expansion and Upgrading Project and continued to advance toward transformation and upgrading. In October 2023, DeLong was awarded the certification of “Commercial Vehicle Aftermarket Alliance Council Member Unit.” In March 2024, DeLong obtained the “IATF 16949:2016 Quality Management System Certification,” and in June 2024, it was recognized as a “Small and Medium-Sized Enterprise of Guizhou Province.” In April 2026, DeLong obtained the “Enterprise Intellectual Property Compliance Management System Certification” under the GB/T 29490-2023 standard.