v3.25.4
Benefits and interests of directors - Summary of Detailed Information of Directors Emoluments (Detail) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information of directors emoluments [line items]      
Salaries and bonuses ¥ 37,412 ¥ 26,074 ¥ 29,698
Pension costs - defined contribution plans 374 359 363
Other benefits 6,262 7,267 7,058
Total 41,754 14,651 59,838
Director [Member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee 1,946 2,000 2,448
Salaries and bonuses 20,237 12,570 15,003
Pension costs - defined contribution plans 158 109 120
Other Social security and housing fund 118 60 61
Other benefits 4,271 4,274 4,762
Total 26,730 19,013 22,394
Director [Member] | Executive Directors [member] | Cho Yong Suk [member]      
Disclosure of detailed information of directors emoluments [line items]      
Salaries and bonuses 13,050 7,390 7,750
Pension costs - defined contribution plans 69 66 67
Other Social security and housing fund 40 20 15
Other benefits 2,069 2,076 2,242
Total 15,228 9,552 10,074
Director [Member] | Executive Directors [member] | Zhu Peiqin [Member]      
Disclosure of detailed information of directors emoluments [line items]      
Salaries and bonuses 3,090    
Pension costs - defined contribution plans 46    
Other Social security and housing fund 46    
Other benefits 65    
Total 3,247    
Director [Member] | Executive Directors [member] | Gregory Dean Gibb [member]      
Disclosure of detailed information of directors emoluments [line items]      
Salaries and bonuses 4,097 5,180 4,580
Pension costs - defined contribution plans 43 43 40
Other Social security and housing fund 32 40 36
Other benefits 2,137 2,198 2,433
Total 6,309 7,461 7,089
Director [Member] | Executive Directors [member] | Ji Guangheng [member]      
Disclosure of detailed information of directors emoluments [line items]      
Salaries and bonuses     2,673
Pension costs - defined contribution plans     13
Other Social security and housing fund     10
Other benefits     87
Total     2,783
Director [Member] | Non-Executive Directors [member] | Zhang Xudong [member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee 446 500 500
Total 446 500 500
Director [Member] | Non-Executive Directors [member] | Li Weidong [member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee 500 500 500
Total 500 500 500
Director [Member] | Non-Executive Directors [member] | Yang Rusheng [member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee 500 500 500
Total 500 500 500
Director [Member] | Non-Executive Directors [member] | Tang Yunwei [member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee     448
Total     448
Director [Member] | Non-Executive Directors [member] | Li Xianglin [member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee 500 500 500
Total 500 500 ¥ 500
Director [Member] | Non-Executive Directors [member] | Liu Hui [Member]      
Disclosure of detailed information of directors emoluments [line items]      
Director's fee 0    
Salaries and bonuses 0    
Pension costs - defined contribution plans 0    
Other Social security and housing fund 0    
Other benefits 0    
Total ¥ 0    
Director [Member] | Non-Executive Directors [member] | Ji Guangheng [member]      
Disclosure of detailed information of directors emoluments [line items]      
Salaries and bonuses   0  
Pension costs - defined contribution plans   0  
Other Social security and housing fund   0  
Other benefits   0  
Total   ¥ 0