Maybe Mark Lee and Jan Davis on STS-47 https://en.wikipedia.org/wiki/STS-47

This article is based on a report from the Independent https://www.independent.co.uk/travel/news-and-advice/china-hypersonic-flights-speed-concorde-b2051192.html nowhere does it say they have completed a test flight.

The brand Space Transportation, also known as the company Beijing Lingkong Tianxing Technology, has released an animated video which shows how its proposed “space flights” might look