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Taxation (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)
Taxation
Equity interest held	25.00%	25.00%
Adjustments to the tax benefit accumulated in prior years				¥ (4,324)
Current income tax expense	¥ 62,348		¥ 23,565	6,368
Deferred income tax expense	(7,245)		18,700
Total	¥ 55,103	$ 7,989	¥ 42,265	¥ 6,368
US
Taxation
Effective income tax rate	29.84%	29.84%	29.84%	29.84%
United Kingdom
Taxation
Effective income tax rate	19.00%	19.00%	19.00%	19.00%
Germany
Taxation
Effective income tax rate	32.98%	32.98%	32.98%	32.98%
Norway
Taxation
Effective income tax rate	22.00%	22.00%	22.00%
Netherlands
Taxation
Effective income tax rate	25.80%	25.80%	25.00%
Cayman Islands Tax Information Authority [Member]
Taxation
Effective income tax rate	0.00%	0.00%
State Administration of Taxation, China [Member]
Taxation
Effective income tax rate	25.00%	25.00%
Preferential tax rate	15.00%	15.00%
Percentage of withholding tax for foreign investors non resident enterprises	10.00%	10.00%
Percentage of withholding tax for resident enterprise	5.00%	5.00%
State Administration of Taxation, China [Member] | Minimum
Taxation
Percent entitled to claim for qualified research and development expenses	175.00%	175.00%
Additional percentage of qualified research and development expenses claimed in annual filing	75.00%	75.00%
State Administration of Taxation, China [Member] | Maximum
Taxation
Percent entitled to claim for qualified research and development expenses	200.00%	200.00%
Additional percentage of qualified research and development expenses claimed in annual filing	100.00%	100.00%
Inland Revenue, Hong Kong [Member] | Remaining taxable income
Taxation
Effective income tax rate	16.50%	16.50%
Inland Revenue, Hong Kong [Member] | First HKD2,000 Taxable Income
Taxation
Effective income tax rate	8.25%	8.25%

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