Summary of significant accounting policies - Summary of principal foreign currency exchange rates (Details) |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
GBP (£)
MXN ($)
INR (₨)
SGD ($)
CHF (SFr)
CNY (¥)
JPY (¥)
USD ($)
HKD ($)
SEK (kr)
|
Dec. 31, 2024
HKD ($)
INR (₨)
SEK (kr)
SGD ($)
GBP (£)
MXN ($)
CHF (SFr)
JPY (¥)
CNY (¥)
USD ($)
|
Dec. 31, 2023
CHF (SFr)
GBP (£)
JPY (¥)
MXN ($)
USD ($)
CNY (¥)
INR (₨)
SGD ($)
HKD ($)
SEK (kr)
|
|
| CNY | |||
| Consolidation of foreign entities | |||
| Exchange rate | ¥ | 8.2355 | 7.5257 | 7.8592 |
| Average | ¥ | 8.0866 | 7.7257 | 7.6352 |
| CHF | |||
| Consolidation of foreign entities | |||
| Exchange rate | SFr | 0.9305 | 0.941 | 0.9336 |
| Average | SFr | 0.9372 | 0.9524 | 0.9709 |
| GBP | |||
| Consolidation of foreign entities | |||
| Exchange rate | £ | 0.8729 | 0.8291 | 0.8693 |
| Average | £ | 0.8567 | 0.8466 | 0.8694 |
| HKD | |||
| Consolidation of foreign entities | |||
| Exchange rate | 9.1181 | 8.1271 | 8.6727 |
| Average | 8.8242 | 8.4686 | 8.4863 |
| INR | |||
| Consolidation of foreign entities | |||
| Exchange rate | ₨ | 105.6375 | 88.1436 | 91.942 |
| Average | ₨ | 97.9243 | 89.7706 | 88.9784 |
| JPY | |||
| Consolidation of foreign entities | |||
| Exchange rate | ¥ | 183.8281 | 162.7882 | 156.5266 |
| Average | ¥ | 168.6815 | 163.4023 | 151.4929 |
| MXN | |||
| Consolidation of foreign entities | |||
| Exchange rate | 21.1232 | 21.5161 | 18.7952 |
| Average | 21.6346 | 19.8808 | 19.1355 |
| SEK | |||
| Consolidation of foreign entities | |||
| Exchange rate | kr | 10.812 | 11.4634 | 11.0537 |
| Average | kr | 11.0542 | 11.4271 | 11.4722 |
| SGD | |||
| Consolidation of foreign entities | |||
| Exchange rate | 1.5087 | 1.4142 | 1.4616 |
| Average | 1.4761 | 1.4462 | 1.4524 |
| USD | |||
| Consolidation of foreign entities | |||
| Exchange rate | 1.1717 | 1.0469 | 1.1096 |
| Average | 1.1319 | 1.0853 | 1.0841 |