BEIJING, Oct 29 — A Chinese aerospace company has completed a successful test flight of a prototype for a supersonic commercial transport plane that aims to travel at Mach 4, which is twice as fast as the retired Concorde.

Beijing-based Space Transportation, also known as Lingkong Tianxing Technology, announced on Sunday that its Yunxing prototype had flown successfully the day before.

In a report by South China Morning Post, the company said it plans to conduct an additional assessment of its engine technology in November.