Why didn't there be a flight from Nanning to Shanghai on February 9, 20 19?

There are flights these days, but 10' s economy class and first class tickets are sold out, so there are no flights. 1 1 There are few first-class tickets per day. 10 ticket, please refer to the following figure:

1 1 daily air ticket reference flight:

The remaining tickets may be changed at any time. This is the query result of1February 9 1 1:30, which is subject to the passenger's immediate query.