How long has the Lanzhou epidemic been closed this year?

Lanzhou epidemic was closed for 24 days. According to relevant data, the epidemic situation in Lanzhou in March ended on April 1 1. In March this year, the Lanzhou epidemic was sealed in March 18, and it was released in April 1 1, and it was sealed for 24 days. 165438+ 10 was unsealed in the middle and late October. The epidemic situation in Lanzhou has not been eliminated. Because there are new cases, it can't be unsealed in a short time.