BEIJING — Multiple logistics indexes have recently reversed their downward trajectories with improvements in market demand and business operations, indicating China's economic engine is on track to make a comeback thanks to concerted pro-growth policies. During last week's national holiday, China's express delivery firms were swamped with orders, handling more than 4.1 billion parcels in total, the State Post Bureau said on Oct 8. An industry index shows the country's courier market bounced back from its previous lows to become brisk in September, a usually buoyant month. The China express delivery development index, a measure of overall express delivery business activities and trends, came in at 353.1 last month, up 13.5 percent month-on-month. (....)