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Income taxes.

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Payment of dividends withholding tax percentage.

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Preferential tax rate.

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The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Income Taxes - Additional Information (Details) ¥ / shares in Units, $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥) ¥ / shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 CNY (¥) ¥ / shares	Dec. 31, 2020 CNY (¥) ¥ / shares
Income Taxes [Line Items]
Statutory income tax rate	25.00%	25.00%	25.00%	25.00%
Income tax expenses	¥ 11,992,000	$ 1,739	¥ (19,618,000)	¥ (236,000)
Income tax benefit/expenses if the tax holidays granted to Wuhan Shangde were not available	¥ 24,338		¥ (11,560)
Basic \| (per share)	¥ 94.14	$ 13.65	¥ 32.56	¥ (63.74)
Diluted \| (per share)	¥ 94.14	$ 13.65	¥ 32.56	¥ (63.74)
Uncertain tax positions	¥ 0		¥ 0	¥ 0
Income tax rate outside the PRC	25.00%	25.00%
PRC available for distribution earnings	¥ 167,946,000
Wuhan Shangde Online Education Technology Co., Ltd. ("Wuhan Shangde")
Income Taxes [Line Items]
Basic \| ¥ / shares			¥ 31.36
Diluted \| ¥ / shares	¥ 92.34
Maximum
Income Taxes [Line Items]
Payment of dividends withholding tax, percentage	10.00%	10.00%
Minimum
Income Taxes [Line Items]
Payment of dividends withholding tax, percentage	5.00%	5.00%
Hong Kong
Income Taxes [Line Items]
Income tax expenses	¥ 0		¥ 0	¥ 0
Hong Kong \| For the First 2 Million Profits
Income Taxes [Line Items]
Statutory income tax rate	8.25%	8.25%
Hong Kong \| For the Remaining Profits
Income Taxes [Line Items]
Statutory income tax rate	16.50%	16.50%
China
Income Taxes [Line Items]
Statutory income tax rate	25.00%	25.00%
China \| subsidiaries and the Variable Interest Entities
Income Taxes [Line Items]
Statutory income tax rate	25.00%	25.00%
Operating loss carryforwards	¥ 2,544,003
Expiration start date	Dec. 31, 2023	Dec. 31, 2023
Expiration end date	Dec. 31, 2029	Dec. 31, 2029
China \| 2016 \| Beijing Shangde Online Education Technology Company Limited
Income Taxes [Line Items]
Statutory income tax rate	25.00%	25.00%
Preferential tax rate description	Beijing Sunlands was qualified as “high and new technology enterprise strongly supported by the State” (“HNTE”) and was accordingly entitled to a preferential tax rate of 15% from calendar years 2016 through 2020. For 2021 and 2022, Beijing Sunlands was subject to an EIT rate of 25%.	Beijing Sunlands was qualified as “high and new technology enterprise strongly supported by the State” (“HNTE”) and was accordingly entitled to a preferential tax rate of 15% from calendar years 2016 through 2020. For 2021 and 2022, Beijing Sunlands was subject to an EIT rate of 25%.
Preferential tax rate	15.00%	15.00%
Preferential tax exemption approved start year	2016	2016
Preferential tax exemption approved end year	2020	2020
China \| 2021 \| Wuhan Shangde Online Education Technology Co., Ltd. ("Wuhan Shangde")
Income Taxes [Line Items]
Statutory income tax rate	15.00%	15.00%
Preferential tax rate description	Wuhan Shangde was qualified as HNTE and is accordingly entitled to a preferential tax rate of 15% from calendar years 2021 through 2023 and expected to be subject to an EIT rate of 15% as long as it maintains its status as a HNTE.	Wuhan Shangde was qualified as HNTE and is accordingly entitled to a preferential tax rate of 15% from calendar years 2021 through 2023 and expected to be subject to an EIT rate of 15% as long as it maintains its status as a HNTE.
Preferential tax rate	15.00%	15.00%
Preferential tax exemption approved start year	2021	2021
Preferential tax exemption approved end year	2023	2023