Group Financial Results
Revenue
By nature
| 
 | Year ended 31 December | Increase/(Decrease) | ||
|---|---|---|---|---|
| HK$ million | 2021 | 2020 | Amount | % | 
| Net interest income | 181,973 | 172,018 | 9,955 | 5.8% | 
| Net fee and commission income | 49,720 | 39,178 | 10,542 | 27% | 
| Sales of goods and services | 452,163 | 323,808 | 128,355 | 40% | 
| – Sales of goods | 385,350 | 268,964 | 116,386 | 43% | 
| – Revenue from construction contracts | 34,589 | 24,984 | 9,605 | 38% | 
| – Revenue from other services | 32,224 | 29,860 | 2,364 | 7.9% | 
| Other revenue | 25,080 | 17,945 | 7,135 | 40% | 

Expected credit losses and other impairment losses
In 2021, expected credit losses and asset impairment losses of HK$104,798 million were recorded, an increase of 4.2% from the year before. CITIC Bank accounted for HK$92,792 million of these losses, including HK$60,492 million expected credited losses in its loans and advances to customers.
Net finance charges
In 2021, the finance costs of the Group amounted to HK$9,433 million, a year-on-year decrease of HK$1,717 million, or 15%, mainly due to the decrease in interest expenses from loans.
In 2021, the finance income of the Group amounted to HK$2,036 million, a year-on-year increase of HK$770 million, or 61%, mainly due to the increase in interest income from bank deposits.
Income tax
In 2021, income tax of the Group were HK$20,863 million, an increase of HK$4,073 million as compared with last year, this was consistent with the increase in profit before taxation.