Income tax (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | 48 Months Ended | |||
---|---|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2018 |
Dec. 31, 2026 |
|
Income tax | |||||
Percentage of tax deduction to tax assessable profits as percentage of qualified R&D expenses | 200.00% | 100.00% | 75.00% | 50.00% | |
Deductible tax losses carry forwards | ¥ 2,566,249 | ||||
HONG KONG | |||||
Income tax | |||||
Statutory income tax rate | 16.50% | ||||
CHINA | |||||
Income tax | |||||
Statutory income tax rate | 25.00% | ||||
Preferential income tax rate | 15.00% | ||||
CHINA | Kuntong | |||||
Income tax | |||||
Preferential income tax rate | 15.00% |