Couples in Weifang, East China's Shandong province, register their marriage certificates at the local marriage registration office, bidding farewell to single life on Nov 11, 2019, also known as "Singles Day" in China. [Photo/Sipa]

A newlywed couple show their marriage certificates at the local marriage registration office in Weifang, East China's Shandong province, on Nov 11, 2019, also known as "Singles Day" in China. [Photo/Sipa]

Couples in Weifang, East China's Shandong province, register their marriage certificates at the local marriage registration office, bidding farewell to single life on Nov11, 2019, also known as "Singles Day" in China. [Photo/Sipa]

A staff worker at the local marriage registration office in Weifang, East China's Shandong province prepares applicants' marriage certificates on Nov 11, 2019, also known as "Singles Day" in China. [Photo/Sipa]

Couples in Weifang, East China's Shandong province, gather to register their marriage certificates at the local marriage registration office, bidding farewell to single life on Nov 11, 2019, also known as "Singles Day" in China. [Photo/Sipa]

Couples in Weifang, East China's Shandong province fill out application forms to register their marriage certificates at the local marriage registration office on Nov 11, 2019, also known as "Singles Day" in China. [Photo/Sipa]