BEIJING (Reuters) -China’s annual factory gate prices grew at their fastest pace on record in September, driven by energy curbs and soaring commodity prices, piling pressure on businesses already grappling with supply bottlenecks. The producer price index (PPI) rose 10.7% from a year earlier in September, the National Bureau of Statistics (NBS) said on Thursday, the biggest rise since the data began to be compiled in 1996. Economists in a Reuters poll had expected the PPI to rise 10.5% after a 9.5% increase in August. A widening power shortage in China, caused by the country’s transition to clean energy, booming industrial demand and high commodity prices, have halted production at numerous factories including many supplying big global brands such as Apple. The power crunch has hit output across the cement, steel，and aluminum industries, while utility companies have struggled to keep up with post-pandemic power demand. Against this backdrop, Chinese energy and petrochemicals futures rose to multi-year and record highs respectively on Monday, also fuelled by an oil price rally. Thermal coal prices on the Zhengzhou Commodity Exchange gained 60% last month, and were last up 8% at 1,408.20 yuan ($218.77) per tonne amid a coal shortage. Beijing has taken a raft of measures to curb record-high coal prices and ease the country’s power crunch, including urging coal miners to boost output and manage electricity demand at industrial plants. Despite this, coal prices have remained elevated, partly due to the shutdown of dozens of coal mines as floods hit China’s top coal producing province of Shanxi. NBS data also showed China’s consumer price index (CPI) rose 0.7% year-on-year in September, smaller than the 0.9% gain forecast in the Reuters poll and a 0.8% rise in August. Pork prices, a key component of China’s CPI, dropped 46.9% year-on-year. Beijing is buying up pork to support prices of the country’s staple meat after they plunged earlier this year, leading to heavy losses for farmers. Core inflation, which strips out volatile food and energy prices, reached 1.2% in September after being flat in August. Reporting by Liangping Gao, Stella Qiu and Ryan Woo; Editing by Ana Nicolaci da Costa Our Standards: The Thomson Reuters Trust Principles.