A sign with the personal profile of a single person who hopes to find a spouse is seen as a couple chat at People's Square in downtown Shanghai August 11, 2013.[Photo/Agencies]

Signs with the personal profiles of singles who hope to find spouses are seen in People's Square in downtown Shanghai August 11, 2013.[Photo/Agencies]

27-year-old Hang Cheng waits backstage during the recording of an episode of "Meet you on Saturday", a matchmaking television programme, at a local television station in Shanghai July 28, 2013. [Photo/Agencies]

A man uses his phone to scan a QR code sticker, which is used to share personal information, during a matchmaking event in Jinshan beach, south of Shanghai July 20, 2013. [Photo/Agencies]

A woman, who is looking for a spouse for her child, takes notes from a personal profile board during a mass wedding organised as part of a matchmaking event in Shanghai May 18, 2013. [Photo/Agencies]

The parents of a person who is looking for a spouse, display a sign with their child's personal profile in People's Square in downtown Shanghai August 11, 2013. [Photo/Agencies]