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CONSOLIDATED STATEMENTS OF CASH FLOWS ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Cash Flows from Operating Activities |  |  |  |
Net loss | ¥ (750,227) | $ (105,666) | ¥ (821,333) | ¥ (1,547,038)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |
Depreciation of property and equipment | 53,683 | 7,561 | 114,047 | 130,666
Amortization of intangible assets | 61,077 | 8,603 | 56,848 | 50,705
Share-based compensation | 77,502 | 10,915 | 340,860 | 530,440
Amortization of right-of-use assets | 88,645 | 12,485 | 168,369 | 245,893
Recognition of deferred income | (15,733) | (2,216) | (14,934) | (14,515)
Impairment allowance of inventory | (38,246) | (5,387) | (3,079) | 87,045
Current expected credit losses | 19,887 | 2,801 |  |
Deferred income tax expenses (benefits) | (8,655) | (1,219) | (8,360) | (5,428)
Impairment of and (gain) loss on disposal of property and equipment | (1,188) | (167) | 80,288 | 36,231
Loss on disposal of intangible assets | 381 | 54 | 920 | 2,672
Gain from acquisition of a joint venture |  |  |  | (2,094)
Impairment of investments |  |  | 5,078 | 1,375
Share of income from equity investments | (10,122) | (1,426) | (12,548) | (5,978)
Impairment of goodwill | 354,039 | 49,865 | 0 | 0
Changes in operating assets and liabilities: |  |  |  |
Accounts receivable | (4,472) | (630) | 154,995 | 99,745
Interest receivables on short-term investments | 937 | 132 | 319 |
Prepayments and other current assets | (7,270) | (1,024) | 65,916 | (42,715)
Inventories | 109,443 | 15,415 | 277,997 | (109,930)
Other non-current assets | 25,785 | 3,632 | 27,335 | (18,961)
Amounts due from related parties | (27,969) | (3,939) | (5,594) | 1,260
Amounts due to related parties | (17,811) | (2,509) | 13,275 | 2,153
Accounts payable | (14,156) | (1,994) | (120,970) | (244,444)
Accrued expenses and other liabilities | 65,322 | 9,199 | (17,303) | (63,683)
Advances from customers | 24,927 | 3,511 | (4,028) | 14,376
Deferred income |  |  |  | 71,668
Income tax payables | (3,880) | (546) | 5,079 | (1,437)
Lease liabilities | (89,341) | (12,583) | (166,969) | (238,447)
Net Cash (used in) provided by Operating Activities | (107,442) | (15,133) | 136,208 | (1,020,441)
Cash Flows from Investing Activities |  |  |  |
Purchases of intangible assets | (321) | (45) | (8,550) | (25,304)
Purchases of property and equipment | (43,648) | (6,148) | (50,778) | (141,433)
Proceeds from disposal of property and equipment | 1,953 | 275 | 4,099 |
Purchases of short-term investments | (2,341,533) | (329,798) | (2,421,802) |
Sales of short-term investments | 2,222,376 | 313,015 | 1,459,564 |
Acquisition of businesses, net of cash and cash equivalents acquired |  |  | (2,107) | (989,652)
Investments on equity investments | (121,547) | (17,119) | (135,842) | (322,825)
Pre-paid consideration for an acquisition |  |  |  | (5,043)
Proceeds from disposal of investments | 22,233 | 3,131 |  |
Net Cash used in Investing Activities | (260,487) | (36,689) | (1,155,416) | (1,484,257)
Cash Flows from Financing Activities |  |  |  |
Repayments for short-term borrowings |  |  |  | (100)
Repayment of a shareholder receivable resulting from Repurchases of Ordinary Shares |  |  |  | 12,959
Capital contributions from non-controlling interests |  |  |  | 596
Issuance costs of issuance of Ordinary Shares in IPO |  |  | (1,706) |
Proceeds from exercise of vested share options | 4,902 | 690 | 1,906 |
Repurchases of Ordinary shares | (212,693) | (29,957) | (654,650) | (15,161)
Repurchase of redeemable non-controlling interests | (134,664) | (18,967) |  |
Net Cash used in Financing Activities | (342,455) | (48,234) | (654,450) | (1,706)
Effect of exchange rate changes on cash and cash equivalents and restricted cash | 14,192 | 1,999 | 89,978 | (88,980)
Net decrease in cash and cash equivalents and restricted cash | (696,192) | (98,057) | (1,583,680) | (2,595,384)
Cash and cash equivalents and restricted cash at the beginning of the year | 1,554,328 | 218,923 | 3,138,008 | 5,733,392
Cash and cash equivalents and restricted cash at the end of the year | 858,136 | 120,866 | 1,554,328 | 3,138,008
Supplemental disclosures of cash flow information |  |  |  |
Income taxes paid | (7,750) | (1,092) | (6,108) | (6,190)
Supplemental schedule of non-cash investing and financing activities |  |  |  |
Purchases of property and equipment | 12,687 | 1,787 | 10,607 | 19,709
Purchases of intangible assets | 397 | 56 | 282 | 2,999
Receivables of exercise price of share options | 1,633 | 230 |  | 1,920
Payable for repurchases of Ordinary Shares | 442 | 62 |  | 7,166
Capital injection from non-controlling interests |  |  | ¥ 1,337 | ¥ 338,587
Repurchase of redeemable non-controlling interests | 22,197 | 3,126 |  |
Recognition of redeemable non-controlling interests | ¥ 50,129 | $ 7,061 |  |

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Increase (decrease) in prepayments and other current assets. + References No definition available. + Details
Name: | ysg_IncreaseDecreaseInPrepaymentsAndOtherCurrentAssets
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Interest receivables on short-term investments. + References No definition available. + Details
Name: | ysg_InterestReceivablesOnShortTermInvestments
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Issuance costs of issuance of ordinary shares in IPO. + References No definition available. + Details
Name: | ysg_IssuanceCostsOfIssuanceOfOrdinarySharesInIpo
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Non cash purchases of property and equipment. + References No definition available. + Details
Name: | ysg_NonCashPurchasesOfPropertyAndEquipment
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Noncash payable for repurchases of ordinary shares. + References No definition available. + Details
Name: | ysg_NoncashPayableForRepurchasesOfOrdinaryShares
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Noncash purchases of intangible assets. + References No definition available. + Details
Name: | ysg_NoncashPurchasesOfIntangibleAssets
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Noncash receivables of exercise price of share options. + References No definition available. + Details
Name: | ysg_NoncashReceivablesOfExercisePriceOfShareOptions
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Payments to pre-paid consideration for acquisition. + References No definition available. + Details
Name: | ysg_PaymentsToPrePaidConsiderationForAcquisition
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Recognition of deferred income. + References No definition available. + Details
Name: | ysg_RecognitionOfDeferredIncome
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Recognition of redeemable non-controlling interests. + References No definition available. + Details
Name: | ysg_RecognitionOfRedeemableNonControllingInterests
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Repayment of shareholder receivable from repurchases of ordinary shares. + References No definition available. + Details
Name: | ysg_RepaymentOfShareholderReceivableFromRepurchasesOfOrdinaryShares
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Repurchase of redeemable non-controlling interests. + References No definition available. + Details
Name: | ysg_RepurchaseOfRedeemableNonControllingInterests
Namespace Prefix: | ysg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration