### Chinese: 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。
### English: National Health and Health Commission Disease Prevention and Control Bureau, the person in charge of the introduction, for some port cities, cross-border border trade is the main pillar of the local economy, the two sides of the frequent exchanges of border people.
### Errors: There is a major error of incorrect translation has stylistic problems at "National Health and Health Commission Disease Prevention and Control Bureau,". There is a major error of incorrect translation includes information not present in the correct translation at "cross-border border trade". There is a major error of incorrect translation is missing content from the correct translation at "the person in charge of the introduction". There is a major error of incorrect translation does not accurately represent the correct translation at "the two sides of the frequent exchanges of border people". There is a major error of incorrect translation includes information not present in the correct translation at "the introduction".

### Improved English: 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.