The statistics authority on Friday revised China's GDP growth for 2017 from 6.9 percent to 6.8 percent in its final verification.

The GDP was 82.08 trillion yuan ($12.13 trillion) in 2017, down 636.7 billion yuan from the preliminary calculation, the National Bureau of Statistics said.

The growth pace of industrial sectors was lowered from 6.1 percent to 5.9 percent, and that of the services was adjusted from 8 percent to 7.9 percent. The expansion of agricultural sectors on the contrary was revised up by 0.1 percentage point to 4 percent.

The bureau revises each year's GDP twice, the preliminary and final verifications, as more information becomes available.