Officials at all levels of government are under pressure to report good economic results to Beijing as they wait for promotions, demotions and transfers to cascade down from Beijing. So narrower and seemingly more obscure measures of economic activity are being falsified, according to the executives and economists.

“The government officials don’t want to see the negative,” so they tell power managers to report usage declines as zero change, said a chief executive in the power sector.

Another top corporate executive in China with access to electricity grid data from two provinces in east-central China that are centers of heavy industry, Shandong and Jiangsu, said that electricity consumption in both provinces had dropped more than 10 percent in May from a year earlier. Electricity consumption has also fallen in parts of western China. Yet, the economist with ties to the statistical agency said that cities and provinces across the country had reported flat or only slightly rising electricity consumption.

Rohan Kendall, senior analyst for Asian coal at Wood Mackenzie, the global energy consulting firm, said coal stockpiled at Qinhuangdao port reached 9.5 million tons this month, as coal arrives on trains faster than needed by power plants in southern China. That surpasses the previous record of 9.3 million tons, set in November 2008, near the bottom of the global financial downturn.

The next three largest coal storage areas in China — in Tianjin, Caofeidian and Lianyungang — are also at record levels, an executive in China said.

Many Chinese economic indicators already show a slowdown this spring, with fixed-asset investment growing at its weakest pace in May since 2001. The annual growth rate for industrial production has edged below 10 percent, while electricity generation was up only 3.2 percent in May from a year earlier and up only 1.5 percent in April.

The question is whether the actual slowdown is even worse. Skewed government data would help explain why prices for commodities like oil, coal and copper fell heavily this spring even though official Chinese statistics show a more modest deceleration in economic activity.