Air China plans to open service from Chengdu to London in May as part of a West China international expansion strategy after British Airways (BA) suspended the route in January 2017.

BA opened its Chengdu-London service in 2013, but suspended it four years later, saying it was “not commercially viable.”

Local industry analysts warned against low load factors for Air China on the route because of a lack of premium traffic in Chengdu and UK visa problems.

Air China is also committed to accelerating international expansion from Chengdu and plans to open new routes to destinations including Dubai, Maldives, Deli, Istanbul, Islamabad, Rome, Brisbane, Vancouver and San Francisco by 2025, according to Air China southwest branch company GM Li Yunchuan.

Chengdu Shuangliu International Airport, China’s fourth biggest airport in terms of passenger throughput, handled 49.8 million passengers in 2017 on 315 routes (104 international and regional) last year. By 2022, the airport aims to increase international routes to more than 120.