CAAC data set:
Assuming 1900 domestic sectors for the last week, and with a conservative 3 daily legs per hull, the need is only for 90 airplanes. With all the grounded -800 already set aside they still have, in addition,
361x n.b. airbus
40x 737-700
55x A330
= 450 planes to fly the schedule (1/5 already seen in post #412)