How is the number of tourists counted in the statistical yearbook?

From the survey method, the national and domestic tourism data are obtained by the urban survey team of the National Bureau of Statistics ... By filling out a questionnaire to understand the number of trips and travel expenses of each sample family, the total number of trips and travel expenses in the country can be calculated. The Implementation Plan of Sampling Survey on Local Reception of Domestic Tourists focuses on overnight visitors in tourist accommodation facilities, supplemented by day trips and overnight visitors in scenic spots. ...

... the data reflected by various places to the National Tourism Administration reflect that the number of domestic tourists collected by various places is nearly twice that of the national residents (most residents usually only visit one city at a time), and the total income is more than twice that of domestic residents. It is precisely because of this situation that the data of domestic tourism in various places have not been released in the name of the National Tourism Administration.