According to organizers, 1,435 contracts with a total value of 761 billion yuan ($114 billion) have been signed at the 22nd Lanzhou Fair, a new high and up 9.1 percent over last year.
The service sector took up over 50 percent of the total for the first time in the fair's history.
This year's fair focused on international capacity cooperation, big data and cross-border e-commerce.