South Korean President Lee Jae Myung will meet Monday with Chinese counterpart Xi Jinping in Beijing, with closer economic ties as well as the recalcitrant North on the agenda.Lee is the first South Korean leader to visit Beijing in six years and his meeting with Xi comes a day after the nuclear-armed North fired two ballistic missiles into the Sea of Japan.

North Korean leader Kim Jong Un inspected a greenhouse farm construction site along the country's border with China on Friday, and encouraged youths and troops working on the construction in the new year,

Lee’s visit is positive sign for China-South Korea relations. But both sides must heed the lessons from the THAAD dispute.