国家卫生健康委疾病预防控制局有关负责人介绍，对于一些口岸城市来说，跨境边贸是当地主要经济支柱，双方边民往来频繁。
According to the introduction of the person in charge of the Bureau of Disease Prevention and Control of the National Health Commission, for some port cities, cross-border trade is the main local economic pillar and the border residents from both sides have frequent exchanges.