It was unwise to attach the map in a note verbale responding to a joint submission by Vietnam and Malaysia to the United Nations Commission on the Limits of the Continental Shelf in May 2009. This was the first time that China had included the map in an official communication to the UN, and it caused great concern among some ASEAN members.
中国在南中国海画下的“九段线”也许最终会被证明是一个勒住了中国脖子的地缘政治重担。2009年5月，作为对越南和马来西亚共同向联合国委员会提出的《大陆架范围》的回应，中国不明智地在一份照会附加了一份上述地图。这也是中国第一次与联合国的官方通讯中纳入该地图，也因此引发了一些东盟成员国的严重关切。