From 22 to 23 December 2016, the 2nd Lancang-Mekong Cooperation Foreign Ministers' Meeting, the 4th Lancang-Mekong Cooperation Senior Officials' Meeting, the 5th Diplomatic Working Group Meeting, as well as the 1st Meeting of Joint Working Group on Diplomatic and Priority Areas were held in Siem Reap, Cambodia. At the 2nd LMC Foreign Ministers' Meeting, parties reviewed the Matrix of Follow-ups to the Outcomes of the First LMC Leaders' Meeting and discussed the future development of the LMC. The meeting also reviewed and approved three important documents, namely, the Joint Press Communiqué of the 2nd LMC Foreign Ministers' Meeting ,the Matrix of Follow-ups to the Outcomes of the First LMC Leaders' Meeting, and the General Principles for the Establishment of Joint Working Groups on the LMC Priority Areas.