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Statutory Reserves and Restricted Net Assets - Statement of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Statement of Cash Flows |  |  |
Net cash generated from/(used in) operating activities | $ 36,443 | $ (70,654) | $ (126,103)
Net cash (used in)/generated from investing activities | 332,455 | (714,225) | (112,957)
Proceeds from issuance of Class A ordinary shares upon U.S. IPO and related over-allotment option, net of cost of issuance |  |  | 904,732
Payment for repurchase and cancellation of ordinary shares | (3,339) | (48,678) | (64,000)
Proceeds from issuance of ordinary shares prior to Initial Public Offering |  |  | 200,000
Proceeds from exercise of share options | 1,187 | 1,039 | 1,070
Payments of deferred offering costs | 71 |  |
Net cash generated from/ (used in) financing activities | (2,223) | (38,582) | 1,041,802
Effect of exchange rate changes on cash and cash equivalents, restricted cash | (1,148) | (7,954) | 2,879
Net increase/ (decrease) in cash and cash equivalents, restricted cash | 365,527 | (831,415) | 805,621
Cash and cash equivalents, restricted cash at the beginning of year | 133,161 | 964,576 | 158,955
Cash and cash equivalents, restricted cash at the end of year | 498,688 | 133,161 | 964,576
Reportable Legal Entities | Parent Company |  |  |
Statement of Cash Flows |  |  |
Net cash generated from/(used in) operating activities | (3,478) | (1,408) | 11,255
Advance to, and investment in subsidiaries | (7,940) |  | (1,037,244)
Proceeds from subsidiaries | 30,349 | 28,842 |
Net cash (used in)/generated from investing activities | 22,409 | 28,842 | (1,037,244)
Proceeds from issuance of Class A ordinary shares upon U.S. IPO and related over-allotment option, net of cost of issuance |  |  | 904,732
Payment for repurchase and cancellation of ordinary shares | (3,339) | (48,678) | (64,000)
Proceeds from issuance of Class A ordinary shares upon the Dual Primary Listing, net of cost of issuance |  | 9,057 |
Proceeds from issuance of ordinary shares prior to Initial Public Offering |  |  | 200,000
Proceeds from exercise of share options | 1,187 | 1,039 | 1,070
Payments of deferred offering costs | (71) |  |
Net cash generated from/ (used in) financing activities | (2,223) | (38,582) | 1,041,802
Net increase/ (decrease) in cash and cash equivalents, restricted cash | 16,708 | (11,148) | 15,813
Cash and cash equivalents, restricted cash at the beginning of year | 4,685 | 15,833 | 20
Cash and cash equivalents, restricted cash at the end of year | $ 21,393 | $ 4,685 | $ 15,833

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-24 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-4 + Details
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