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ACQUISITIONS - Deutsche Hospitality (Details) - Deutsche Hospitality € in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 02, 2020 CNY (¥) | Jan. 02, 2020 EUR (€) | Dec. 31, 2020 CNY (¥)
Business Acquisition [Line Items] |  |  |
Percentage of ownership interest acquired | 100.00% | 100.00% |
Number of brands in which entity is operating | 5 |  |
Aggregated consideration | ¥ 5,624,000 | € 720 |
Net revenue of the acquiree included in the consolidated statements of comprehensive income |  |  | ¥ 1,532,000,000
Net loss of the acquiree included in the consolidated statements of comprehensive income |  |  | ¥ 1,345,000,000

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