The last group of 691 medics returned from Shanghai to Hefei, capital of east China's Anhui Province, on Monday after they finished their mission in the metropolis.

In a period of 53 days, medics from Anhui provided treatment to a total of 10,303 patients infected with COVID-19, according to the provincial health commission.

"We have received more than 100 thank-you letters from people of all ages, including English letters from foreigners," said Wang Tianping, deputy leader of the Anhui medical team to Shanghai.