[2] Nan returned to China and had trial with Chinese Super League side Chongqing Dangdai Lifan in January 2017.
[4] Yanbian officially announced they ratified Nan's loan deal to Chongqing temporary for one season on 28 February 2017.
[11] On 19 December 2017, Yanbian submitted a claim to FIFA Dispute Resolution Chamber (DRC) for the ownership of Nan Song.
[12] On 8 February 2018, Bucheon FC 1995 made an official statement that the declaration of Yanbian was completely wrong and would defend the interests of the club and the player.
[13] On 4 April 2018, he made his debut for Bucheon in a 2–1 away defeat against Busan IPark in the 2018 Korean FA Cup, replacing Kim Ji-ho in the 82nd minute.