Chinese Premier Li Keqiang arrived here on Saturday for talks with South Korean President Park Geun-hye to discuss ways to further boost bilateral relations.
The two leaders are expected to exchange opinions on issues of mutual interest, including North Korea's nuclear weapons programme, Yonhap News Agency reported.
It marks Li's first trip to South Korea since 2013 when he took office.
The summit comes a day before Park and Li are set to meet with Japanese Prime Minister Shinzo Abe in a trilateral summit, the first such meeting in more than three years.
A trilateral summit has not been held since 2012 due to a territorial dispute between China and Japan.
Li also plans to meet with South Korean Prime Minister Hwang Kyo-ahn and Parliamentary Speaker Chung Ui-hwa during his three-day visit.
On Monday, Park is set to hold talks with Abe.