
They were joined by government officials, local authorities and industry representatives.
The project covers three villages – Phabong, Naleuang and Naphong.
The project will invest about US$300 million (Bt10.5 billion) and use a new dry process technology.
Hongshi Holding Group holds 70 per cent of the shares, while Saythirath Group has 30 per cent.
The plant will use new technology that is safe and environmentally friendly and once completed, it will produce high quality products for export and domestic supply.
Most of the export products will focus on Thailand and the remainder will supply the domestic market especially government projects.
It will also contribute to infrastructure such as road and bridge construction and hydropower development projects.
It will help reduce cement imports and create job opportunities for local people during project construction and operation.
The project plans to develop roads, bridges and infrastructure development around the facility, which will also assist local transport.
Hongshi Holding Group is one of the biggest cement enterprises in China, which has operated businesses in construction materials and financial services, managing director Xu Youyuan said at the ceremony.
The company has $4 billion in property with 12,000 employees and is recognised for its energy expansion and environmental protection, he said.
He believed that the project will help contribute to socioeconomic development, especially in the province.The company promised that it will be honest and will implement all its activities in accordance with Lao regulations and respect local culture.
Vidong advised the company to pay more attention during construction to appropriate techniques and the feasibility report as well as to help develop local infrastructure.
He also urged them to respect Lao regulations and local traditions to implement the project according to the time schedule.
The project saw an initial feasibility study last year and agreed to excavate lime and construct a cement factory with the government last month.
The government has approved the establishment of 18 cement factories around the country with capacity of 12 million tonnes a year.
Currently, 12 of those factories are in production with capacity of more than five million tonnes a year, while other plants are under construction or at the feasibility study stage.