Experts say China's official GDP figures are unreliable and cannot be verified. Transparency is sorely lacking. The methodology, inflation assumptions and other basis for the calculations are not presented, so that many of the numbers cannot be reproduced. The official figure for 1st quarter GDP growth is 7%, from China's Bureau of National Statistics. GDP growth estimates developed by Capital Economics show 4.9% growth, by Citi 4.6%, by the China Center of the Conference Board 4%. Since 2012 the Capital Economics estimates are just above 5%, and the Conference Board estimates about 4%, showing that the growth rate has slowed markedly since 2012. As Communist party chief of Liaoning province, the current prime minister showed serious doubts about the GDP numbers and preferred to rely on figures for rail cargo, electricity consumption, bank loans.