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Intangible assets, net | 12 Months Ended
--- | ---
Dec. 31, 2023
Intangible assets, net |
Intangible assets, net | 8. Intangible assets, net Intangible assets consist of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of December 31, 2022
​ | ​ | Weighted |  | ​ |  | ​ |  | ​
​ | ​ | average | ​ | Gross | ​ | ​ | ​ | Net
​ | ​ | amortization | ​ | carrying | ​ | Accumulated | ​ | carrying
​ | ​ | period | ​ | amount | ​ | amortization | ​ | amount
​ | ​ | Year | ​ | RMB | ​ | RMB | ​ | RMB
Software |  | 4.9 |  | 37,055 |  | (18,378) |  | 18,677
Customer relationship |  | 10.0 |  | 7,736 |  | (2,600) |  | 5,136
Trademarks |  | 10.0 |  | 462 |  | (337) |  | 125
Patent right |  | 10.0 |  | 142 |  | (29) |  | 113
Total |  | 5.7 |  | 45,395 |  | (21,344) |  | 24,051
​ 8. Intangible assets, net (continued) ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of December 31, 2023
​ | ​ | Weighted |  | ​ |  | ​ |  | ​
​ | ​ | average | ​ | Gross | ​ | ​ | ​ | Net
​ | ​ | amortization | ​ | carrying | ​ | Accumulated | ​ | carrying
​ | ​ | period | ​ | amount | ​ | amortization | ​ | amount
​ | ​ | Year | ​ | RMB | ​ | RMB | ​ | RMB
Software |  | 3.7 |  | 42,715 |  | (27,482) |  | 15,233
Customer relationship |  | 6.0 |  | 7,735 |  | (3,364) |  | 4,371
Trademarks |  | 10.0 |  | 623 |  | (361) |  | 262
Patent right |  | 10.0 |  | 282 |  | (52) |  | 230
Total |  | 5.0 |  | 51,355 |  | (31,259) |  | 20,096
​ Amortization expenses recognized for the years ended December 31, 2021, 2022 and 2023 were RMB6,387, RMB8,198 and RMB8,857, respectively. No impairment charge was recognized for any of the periods presented. As of December 31, 2023, amortization expenses related to the intangible assets for future periods are estimated to be as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2028 and | ​ | ​
​ |  | 2024 |  | 2025 |  | 2026 |  | 2027 |  | thereafter |  | Total
​ | ​ | RMB | ​ | RMB | ​ | RMB | ​ | RMB | ​ | RMB | ​ | RMB
Amortization expenses |  | 6,712 |  | 6,329 |  | 3,313 |  | 1,610 |  | 2,132 |  | 20,096
​

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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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