China's export growth slowed sharply in September while imports also unexpectedly decelerated, undershooting forecasts by big margins and suggesting manufacturers are slashing prices to move inventory ahead of tariffs from several trade partners. Export momentum had been one bright spot for the Chinese economy that has struggled to gain traction due to weak domestic demand and a property market debt crisis, adding to the urgency for stronger stimulus. Outbound shipments from the world's second-largest economy grew 2.4% year-on-year last month, the slowest pace since April, customs data showed on Monday, missing a forecast 6.0% increase in a Reuters poll of economists and a 8.7% rise in August.