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Net Revenues | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Net Revenues |
17. | NET REVENUES
The following table presents the Group’s net revenues for the years ended December 31, 2021, 2022 and 2023. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Year ended December 31,
​ | ​ | 2021 | ​ | 2022 | ​ | 2023
​ |  | RMB |  | RMB |  | RMB
Product revenues |  |  |  |  |  |
Revenue from LiDAR products |  | 685,333 |  | 1,122,237 |  | 1,735,254
Revenue from gas detection products |  | 19,533 |  | 23,967 |  | 26,863
Other revenues |  | 1,200 |  | 5,663 |  | 2,773
Service revenues |  |  |  |  |  | ​
Engineering design, development and validation service and solution revenue |  | 14,026 |  | 43,101 |  | 100,493
Other service revenues |  | 676 |  | 7,702 |  | 11,606
Total |  | 720,768 |  | 1,202,670 |  | 1,876,989
​ The following table summarizes the Group’s revenues recognized at a point in time or over time. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Year ended December 31,
​ |  | 2021 |  | 2022 |  | 2023
​ | ​ | RMB | ​ | RMB | ​ | RMB
​ | ​ | ​ | ​ | ​ | ​ | ​
Revenue recognized at a point of time |  | 706,066 |  | 1,175,758 |  | 1,783,803
Revenue recognized over time |  | 14,702 |  | 26,912 |  | 93,186
Total |  | 720,768 |  | 1,202,670 |  | 1,876,989
​ The following table summarizes the Group’s revenues disaggregated by the different geographic location. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Year ended December 31,
​ | ​ | 2021 | ​ | 2022 | ​ | 2023
​ |  | RMB |  | RMB |  | RMB
Revenue by geographic location |  |  |  |  |  |
Mainland China |  | 269,634 |  | 697,294 |  | 991,912
North America |  | 352,981 |  | 358,549 |  | 748,147
Europe |  | 67,912 |  | 86,153 |  | 70,500
Other regions |  | 30,241 |  | 60,674 |  | 66,430
Total |  | 720,768 |  | 1,202,670 |  | 1,876,989
​ ​ 17.NET REVENUES (continued) The movements of the Group’s accounts receivable and contract balances are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Accounts |  | Contract |  | Contract
​ | ​ | Receivable | ​ | assets | ​ | liabilities
​ |  | RMB |  | RMB |  | RMB
Opening Balance as of January 1, 2021 |  | 56,319 |  | 38,337 |  | 9,357
Increase, net |  | 29,502 |  | 108,200 |  | 113,246
Ending Balance as of December 31, 2021 |  | 85,821 |  | 146,537 |  | 122,603
Increase(decrease), net |  | 399,223 |  | (133,937) |  | (82,225)
Ending Balance as of December 31, 2022 | ​ | 485,044 |  | 12,600 |  | 40,378
Increase(decrease), net | ​ | 39,774 | ​ | 7,088 | ​ | 39,547
Ending Balance as of December 31, 2023 |  | 524,818 |  | 19,688 |  | 79,925
​ Revenues with amount of RMB8,048, RMB109,120, and RMB37,111 were recognized in the years ended December 31, 2021, 2022 and 2023, respectively, that were included in the balance of contract liabilities at the beginning of each year.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-9 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org//606/tableOfContent + Details
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