What does the fill-and-fill principle mean?

Those who return to Jiujiang from specific areas will be quarantined for 14 days. Those who have returned from those areas and have been quarantined for 14 days will need to undergo at least one nucleic acid test.

For example:

Persons who have lived in Jiangning District and Lishui District of Nanjing City from July 6 to 20, 2021 (returning to Switzerland) must take the initiative to report to Switzerland as soon as possible. The community (village) and unit where the person is located shall report that a 14-day centralized quarantine will be implemented in accordance with the principle of "fill in the gaps and fill in the gaps". Those who have completed 14 days must conduct at least one nucleic acid test.

Except for Jiangning District and Lishui District, people coming to (returning to) Switzerland with a history of living in Nanjing City shall follow the principle of being willing to get tested, and on the premise of taking personal protection, take the initiative to go to institutions with testing qualifications for testing. 1 nucleic acid test.

Filling up means averaging, taking away the excess and supplementing the insufficient. In our country, many large hospitals in big cities are in the "plateau" zone of medical services and quality and safety, and the medical technology and diagnostic and treatment services enjoyed by the people have long been in line with the international advanced level.