BEIJING — China's courier sector continued to expand in September, a monthly industry index has shown.

The China express delivery development index stood at 360.7 in September, up 9.2 percent year-on-year, the State Post Bureau said on Oct 1.

The express delivery business volume is expected to grow 22 percent year-on-year in October, according to the bureau.

The monthly volume of parcels delivered is likely to exceed 10 billion in the fourth quarter, a busy season for the industry, it said.