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INTANGIBLE ASSETS, NET | 12 Months Ended
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Dec. 31, 2023
INTANGIBLE ASSETS, NET |
INTANGIBLE ASSETS, NET |
9. | INTANGIBLE ASSETS, NET
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at December 31
​ |  | 2022 |  | 2023 |  | 2023
​ | ​ | RMB | ​ | RMB | ​ | US$
Customer relationships |  | 620,500 |  | 621,159 |  | 87,488
Patents and technologies |  | 60,900 |  | 60,900 |  | 8,578
Trademarks and domain names |  | 497,939 |  | 497,968 |  | 70,137
Software and copyrights |  | 88,502 |  | 82,168 |  | 11,573
Others |  | 3,707 |  | 4,134 |  | 582
​ |  | 1,271,548 |  | 1,266,329 |  | 178,358
Less: accumulated amortization |  | ​ |  | ​ |  | ​
Customer relationships |  | (130,701) |  | (228,561) |  | (32,192)
Patents and technologies |  | (17,763) |  | (27,913) |  | (3,931)
Trademarks and domain names |  | (70,494) |  | (120,281) |  | (16,941)
Software and copyrights |  | (41,286) |  | (51,459) |  | (7,248)
Others |  | (3,284) |  | (3,637) |  | (512)
​ |  | (263,528) |  | (431,851) |  | (60,824)
Intangible assets, net |  | 1,008,020 |  | 834,478 |  | 117,534
​ Amortization expense of intangible assets for the years ended December 31, 2021, 2022 and 2023 was RMB72,299, RMB173,915 and RMB180,459 (US$25,417), respectively. As of December 31, 2023, estimated amortization expense of the existing intangible assets for each of the next five years and thereafter is as follows: ​
​ | ​ | ​ | ​ | ​
​ |  | RMB |  | US$
2024 |  | 171,738 | ​ | 24,189
2025 |  | 167,084 | ​ | 23,533
2026 |  | 163,407 | ​ | 23,015
2027 |  | 150,206 | ​ | 21,156
2028 and thereafter |  | 182,043 | ​ | 25,641
Total |  | 834,478 | ​ | 117,534
​ ​

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350-30/tableOfContent + Details
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- References No definition available. + Details
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