Boeing has awarded a contract to Aviation Industry Corporation of China (Avic) to produce composite empennage tips for the 777 beginning in 2017, the companies announced on Tuesday at Airshow China in Zhuhai. The deal builds on the contract Boeing signed with Avic earlier this year to produce vertical fin and horizontal stabilizer forward torque box panels.

“This new contract demonstrates the deep confidence Boeing has in Avic’s commitment to world-class aerospace manufacturing,” said Kent Fisher, vice president and general manager, Supplier Management, Boeing Commercial Airplanes. “We have steadily increased our sourcing from Avic with good results. They have not only met our requirements for high quality and on-time delivery, but they have also worked closely with us to meet our airline customers’ demands for affordability.”

Under the contract, workers at Avic subsidiary Shenyang Commercial Aircraft Corporation (SACC) will build tips for the 777 vertical fin and horizontal stabilizer at its new facility near the airport in Shenyang, China. Boeing qualified SACC for composite work in July of this year following an audit of equipment, workforce and processes.

Plans also call for the two companies to jointly establish a manufacturing innovation center (MIC) within the SACC facility to help enhance the manufacturing and technological capabilities of SACC employees. Boeing and AVIC pioneered the MIC concept in 2012, establishing the first center in Beijing to provide classroom training for AVIC employees on Boeing’s successful production methods.

SACC has produced airplane components for Boeing since 1990, starting with cargo doors for the 757 and expanding to complex empennage manufacturing. The company supplies the vertical fin leading edge and tip for the 787 Dreamliner and the entire 737 empennage (section 48) through a contract with Spirit Aerosystems.

Avic facilities across China manufacture parts for all Boeing programs including the 737 vertical and horizontal stabilizers, 747 inboard flap, 767 converted freighter floor beams and 787 rudder.

Over the past 30 years Boeing has purchased more than $2 billion in airplane components and assemblies from China, making it the largest foreign customer for China’s aviation manufacturing industry.