The Hefei base, which was put into production on Nov 18, 2013, is located in a high-tech zone in Hefei, Anhui province. The first phase of the Anhui project was completed on Jan 8, 2019. The project fully adopted rear-surface passivation technology, mainly based on the unmanned intelligent manufacturing route of high-efficiency monocrystalline batteries, and built intelligent factories and digital workshops to further improve TW Solar's profitability, enhance market competitiveness, and consolidate TW Solar's leading position in the high-efficiency crystalline silicon cell industry.

Shuangliu Base is located in Shuangliu District, Chengdu, Sichuan Province. The first phase was completed and put into operation on June 30, 2016, and the construction cycle took only seven months. Mainstream media highly praised it for creating a "Tongwei Speed," "Shuangliu Speed," and "Chengdu Speed," and it has also become a model demonstrative project for the global photovoltaic industry of efficient completion, quick putting into production, quickly reaching production cap, and promptly making a profit.

The second phase was completed and put into operation on September 20, 2017. With the doubling of production capacity and engineering volume, the construction cycle took only seven months, which refreshes the construction speed record again. The production lines of the second phase have been fully upgraded to fully automatic unmanned manufacturing, becoming a model project of "intelligent manufacturing" in Chengdu, taking the lead in realizing digital workshops and intelligent factories, realizing "made in Chengdu" for clean energy products, and actively building a national intelligent manufacturing demonstration base.

The third phase was completed and put into operation on November 18, 2018, and the actual construction period is only six and a half months. The project fully adopts rear-surface passivation technology and mainly adopts the unmanned intelligent manufacturing route of high-efficiency monocrystalline cells. It builds smart factories and digital workshops and has become a high-efficiency crystalline silicon solar cell project with leading technology, production equipment, automation, and intelligence in the global photovoltaic industry.

The fourth phase was completed and put into operation on Nov 18, 2019, with a construction period of only seven months. The project realizes initiation, construction, and production starting in the same year, once again setting a new global record for the single workshop production capacity scale. It is currently the leading crystalline silicon cell workshop in terms of technology, production lines, automation, and intelligence, and it is also a model workshop for smart factories and digital workshops in the global PV industry. The project has a total of 16 fully enclosed automatic production lines for the intelligent manufacturing of high-efficiency crystalline silicon cell slices. All of them produce large-sized cells with lower production costs and higher single wattage. They are composed of robotic grasping mechanical arms and intelligent transportation robots, adding new momentum to TW Solar's smart, digital, modern, and refined management.

TW Solar Meishan Base locates in Ganmei Industrial Park, Meishan City, Sichuan Province. On January 25, 2019, the Meishan Municipal Government, Ganzi Prefecture Government, and Tongwei Group held a signing ceremony for the Tongwei High-tech Green Industrial Park Project and the 10GW High-efficiency Crystalline Silicon Cell Project. On March 27, 2019, the High-efficiency Crystalline Silicon Cell Project of TW Solar Meishan Base started construction. On April 21, 2020, the first phase was completed and put into operation, and the second phase of the project started at the same time. It took only 36 days for the Meishan Project to finalize the investment after the first contact, 50 days for formal signing, and 110 days for the official start of construction, creating a new “Tongwei speed” and “Ganmei speed” for project investment.

On February 28, 2021, the first cell of the second phase of Meishan Base officially rolled off the production line. The second phase covers a total area of 160,000 square meters, with a workshop area of 80,000 square meters. There are 16 fully automatic high-efficiency and intelligent crystalline silicon cell production lines. With the continuous improvement of product technology and manufacturing process, the second phase will be more automated, intelligent, and digital, providing a strong boost to the PV industry and drive the rapid transformation of the energy sector. After its completion, the production capacity of TW Solar Meishan base will reach 15GW, further consolidating Tongwei's position as a leading cell supplier.

Jintang Base is located in Huaikou Town, Jintang County, Chengdu. The 30GW high-efficiency crystal silicon cell and supporting projects will be implemented in phases. It will be gradually completed and put into operation in the next 3-5 years. The project has an investment of about 20 billion yuan, an estimated new output value of about 70 billion yuan, more than 5,000 job opportunities, and an annual tax revenue of about 2 billion yuan. The construction of the first phase of the 6.6GW project started on March 25, 2020, and the first cell cutting went offline in May 2021. The first cell of the second phase rolled off the production line on September 16, 2022.

With the Jintang project as a pilot, Tongwei will actively carry out 5G applications in the industrial Internet field, building the Jintang project as a model of 5G+ advanced manufacturing and promoting the construction of PV green smart town by relying on the industrial manufacturing scene of Tongwei. Jintang Project will make full use of Chengdu as the bridgehead of the Dual-City Economic Circle in Chengdu and Chongqing, the geographic and logistic advantages of China-Europe Freight Trains, and the advantages of hydropower to build a major production base for the export of photovoltaic products in western China and the European market. After reaching full production capacity, it will provide crucial industrial support for the high-quality development of the Dual-City Economic Circle in Chengdu and Chongqing.

The Tonghe project is jointly invested in and constructed by TW Solar and Trina Solar. The project's total area is about 920 mu, with an investment of 6 billion yuan and a supporting production base with an annual output of 15GW high-efficiency crystalline silicon cells and 15GW cutting capabilities. Tonghe New Energy will give full play to the leading advantages of TW Solar and Trina Solar in all aspects of the industry chain, further strengthen the strategic cooperation relationship, and create a new industry development pattern of the professional division of labor, misplaced development, and mutual benefit.

Construction of Tonghe New Energy began in early April 2021, in which the first silicon wafer of the cutting project went offline on Oct 28, 2021, and the first piece of the cell project went offline on Nov 10, 2021. After reaching full production, Tonghe New Energy is estimated to have an annual sales income of 12 billion yuan and an annual tax payment of 300 million yuan. Tonghe New Energy is a joint and integrated layout of the two sides of TW Solar and Trina Solar and an essential method to achieve the stability of raw material supply and industrial chain. It guarantees the production of large-size cells and modules of Trina Solar, the export of Tongwei products, reducing Tongwei's costs, and promoting efficiencies, leading to the enlargement of global market share.