There are now 128 million Chinese in rural areas who qualify as poor, 100 million more than under the previous standard

China has redefined the level at which people in rural areas are considered poor by raising the official poverty line, despite a booming economy.

A sharp upward revision in the official poverty line, announced by the government on Tuesday, means that 128 million Chinese in rural areas now qualify as poor, 100 million more than under the previous standard.

The new threshold of about $1 a day is nearly double the previous amount. While the revised poverty line is still below the World Bank threshold of $1.25 a day, the change brings China closer to international norms and better reflects the country's overall higher standards of living after three decades of buoyant growth.

The old limit, first set in the 1990s and increased periodically thereafter, focused on the bedrock poor at a time China was still largely rural and impoverished. As the country has climbed toward middle income status, experts from the World Bank and Chinese think tanks have urged the government to raise the threshold to capture more poor Chinese.

"The previous poverty line underestimated the number of poor people in rural China," the official newspaper China Daily quoted Wang Sangui, a rural development expert at Renmin University, as saying. "Only 2.8% of the rural population was officially considered poor, which was lower than in many developed countries such as the United States, which has a poverty rate of about 15%."

With the higher threshold, more people qualify for government assistance. Funding for poverty relief is also being raised more than 20% this year to 27bn yuan ($4.2bn), the China Daily reported.