In November 2021, ExxonMobil Huizhou ethylene project held a full-scale construction activity, marking the entry of the project's production unit into the full-scale formal construction stage.

ExxonMobil Huizhou Ethylene Project is one of the first seven major landmark foreign-funded projects in the country, and it is also the first major petrochemical project wholly-owned by an American company in China. The first phase is planned to be completed and put into operation in 2024.

The project is located in Daya Bay Petrochemical Zone, Huizhou. The total investment of the project is about 10 billion US dollars, and the overall construction is divided into two phases. The first phase of the project includes a flexible feed steam cracking unit with an annual output of 1.6 million tons of ethylene, two sets of high-performance linear low-density polyethylene units with a total annual output of 1.2 million tons, and a low-density polyethylene unit with an annual output of 500,000 tons of the world's largest monomer. Density polyethylene plant and two sets of differentiated high-performance polypropylene plants with an annual output of 950,000 tons, as well as a number of supporting projects such as heavy-duty terminals. After the first phase of the project is put into production, it is expected to achieve an operating income of 39 billion yuan per year. It is planned that while the first phase of the project is completed and put into production, the second phase of the project will be started.

In March 2022, ExxonMobil Huizhou Ethylene Project (Phase I) increased its investment by US$2.397 billion, and the total investment in the first phase of the project increased to US$6.34 billion.

Nanjing Engineering Company has undertaken seven main construction general contracting tasks, including a 270,000-ton/year butadiene extraction unit, a 500,000-ton/year high-pressure low-density polyethylene unit, and a boiler unit. The 500,000-ton/year LDPE plant is the world's largest single-unit low-density polyethylene plant. The reaction dam requires extremely high construction accuracy, imported compressors have high installation standards, and the pressure of high-pressure and ultra-high-pressure pipelines reaches 360 MPa. It is the first cooperation between Nanjing Engineering Company. Contracted low density polyethylene plant.