Any delay in joint military drills with the United States would depend on North Korea's behavior during the 2018 Winter Olympics, officials in Seoul said on Wednesday, while a halt to group tours from China suggested Beijing is still wary.

South Korean President Moon Jae-in is seeking to soothe relations with China and the North before the Winter Olympics in South Korea in February and suggested on Tuesday he was prepared to postpone the drills with the United States.

Pyongyang sees the joint exercises as preparation for war, while Beijing is still angry about the deployment of a U.S. anti-missile system, commonly known as THAAD, by South Korea.