The government allowed 190 Chinese traders to enter Vietnam to buy lychee in the northern Bakjiang province.
They will enter through Lang Son province, where at the border they need to be presented with negative Covid-19 certificates issued by the competent Chinese authorities.
They will be tested for coronavirus and quarantined before being allowed to visit lychee farms.
According to the Ministry of Agriculture and Rural Development, Bak Jiang has 28,000 hectares of fruit and plans to harvest 180,000 tonnes this year, up 8 percent from 2020.
Harvesting will take two months from the end of May.
The local Department of Industry and Commerce estimates that if the pandemic contains about 47 percent collected lychees will be exported to China and 2.5 percent to Japan, Australia, the EU and the US.
If the pandemic gets worse but is still under control, 28 percent could go to China.
To protect the lychee-growing area from the pandemic, the province is isolating every person who comes into contact with Covid-19 patients and has established checkpoints on roads leading to the area.
Visitors check temperatures and must provide medical certificates at checkpoints, and cars are disinfected.