Expats visit the Gansu Qin Culture Museum in Lixian county of Longnan, Gansu province on Sept 15. [Photo provided to gogansu.com]

On Sept 15, the "Explore Gansu" group headed to the Gansu Qin Culture Museum in Lixian county of Longnan.

This museum, styled like a palace from Qin and Han dynasties (221 BC-AD 220), is a treasure trove of history and culture.

With over 31,247 artifacts, expats stepped into China's ancient past.