Chinese sailors hold a banner to welcome a South Korean naval ship at a military port in Shanghai, January 14, 2019. (Photos: IC)

South Korean naval destroyer "Chungmugong Yi Sun-sin" arrives at a military port in Shanghai, January 14, 2019, on a goodwill visit.

South Korean sailors pose for photos after arriving on a goodwill mission to China in Shanghai, January 14, 2019.

Band members with the Chinese Navy perform at a welcoming ceremony for a South Korean naval vessel at a military port in Shanghai, January 14, 2019.