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PRINCIPAL ACCOUNTING POLICIES - Revenue recognition (Details) - Services	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
PRINCIPAL ACCOUNTING POLICIES
Percentage of packaged-tour product and services revenues recognized at net basis	90.00%	90.00%	90.00%
Concentration Of Risk Number Of Other Services	0	0	0
Percentage of transportation ticketing services revenue	90.00%	90.00%	90.00%

X

- Definition

Concentration of risk number of other services.

+ References

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+ Details

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X

- Definition

Percentage of packaged-tour product and services revenues recognized at net basis.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of transportation ticketing services revenue.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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