We have been operating our chemical enterprise since 1999, marking a quarter century of experience and history. This wealth of expertise instills strong confidence and faith in our ability to consistently deliver the best quality, service, and supply to our long-standing, loyal customers.
Our first factory of manufacturing sodium sulfide was founded in the year of 2013. The factory is located in Meishan, Sichuan Province, China. Spanning nearly 20 hectares, the sizable production site was constructed with a total investment exceeding $20 million USD. This state-of-the-art facility was designed and built to meet the growing demand for high-quality sodium sulfide. With advanced production capabilities and a deep commitment to operational excellence, the Meishan factory has become a cornerstone of our chemical enterprise.
Just two years after establishing our initial manufacturing site, we opened a second sodium sulfide factory to keep pace with the rapid expansion of our business. This new facility, our largest to date, is located within the industrial park of Chongqing City, China. Representing a total investment exceeding $40 million USD, the Chongqing plant was built to significantly expand our production capacity. With an annual output nearing 150,000 metric tons, this state-of-the-art factory has become a symbolized improvement of our sodium sulfide supply chain.
Driven by our unstoppable growth, we rapidly expanded our domestic market share to exceed 50% across China. Emboldened by this landmark achievement, we made the strategic decision in 2018 to launch our international business expansion. Since then, we have steadily grown our global footprint to cover a vast geographical expanse, including Southeast Asia, Central Asia, South Asia, Eastern Europe, Africa, and South America, among other key regions. This international diversification has allowed us to establish a truly worldwide presence as a leading supplier of high-quality sodium sulfide products.
In pursuit of further expanding our market share within China, we have decided to invest in a third sodium sulfide manufacturing facility. This new plant is located in Mianyang, Sichuan Province.The total investment in this state-of-the-art production site has reached $25 million. All of the equipment and infrastructure utilize high-grade stainless steel and other premium materials to ensure the highest standards of quality and durability. Furthermore, the safety and environmental protection systems were constructed in full compliance with the rigorous standards for the petrochemical industry. The company officially commenced operations at this Mianyang plant in 2019, establishing an annual production capacity of 60,000 metric tons of sodium sulfide products.
Despite already operating three manufacturing facilities prior to 2023, the insatiable market demand for our sodium sulfide products compelled us to further expand our production capacity. In 2023, we made the strategic decision to acquire an additional factory and invest over $10 million to upgrade the equipment & environmentally-friendly technologies. This latest production site, which joined our growing global footprint in 2023, has an annual output exceeding 60,000 metric tons. The integration of this facility has allowed us to better serve the ever-increasing needs of our customers worldwide.