Construction has begun on 40 key projects in the city of Nyingchi, southwest China's Tibet Autonomous Region, authorities said Wednesday.

The projects cover a variety of areas, including infrastructure, public services, culture and tourism. The total investment stands at 2.339 billion yuan (327.2 million U.S. dollars). The projects are expected to employ more than 4,800 local farmers and herdsmen, and will increase people's incomes by 234 million yuan.

The projects bear great significance as they will bolster the industrial development and improve people's lives in Nyingchi, according to the city's government.

Work resumed on 51 key projects previously in Nyingchi.