All the numbers are reported daily by the government here: Covid-19 Vaccination Infographic (moph.go.th) dashboard-vaccine.moph.go.th. If you can read Thai there are breakdowns, too.
40 Schools in Chiang Mai will open on MONDAY. In my wife's school most of the teachers got 1 jab of Sino vax and none of the kids are vaccinated yet. So this news story is disconnected from reality.