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INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2021
INVESTMENTS. |
Schedule of investments | ​
​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ |  | 2020 |  | 2021
Equity securities with readily determinable fair values: | ​ |  | ​ |
Accor |  | 3,849 |  | 2,508
Other marketable securities |  | 54 |  | 81
Equity securities without readily determinable fair values: |  |  |  | ​
Cjia/Cjia Group |  | 183 |  | 168
OYO |  | 66 |  | 54
Other equity securities without readily determinable fair values |  | 72 |  | 71
Equity-method investments: |  |  |  | ​
AAPC LUB |  | 490 |  | 525
Hotel related funds |  | 476 |  | 488
China Hospitality JV |  | 103 |  | 99
Zleep | ​ | 88 | ​ | 68
Commerz Real Institute | ​ | — | ​ | 85
Other investments |  | 225 |  | 187
Available-for-sale debt securities: |  |  |  | ​
Cjia/Cjia Group |  | 220 |  | 220
Total |  | 5,826 |  | 4,554

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI http://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI http://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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