Other portraits include those of the late agronomist Yuan Longping, who devoted himself to agricultural education and research, pharmacologist Tu Youyou, the winner of the 2015 Nobel Prize in physiology or medicine for the discovery of artemisinin, and Huang Xuhua, chief designer of China's first-generation nuclear submarines and a recipient in 2019 of the Medal of the Republic, the country's top honor.
The use of Changhua stones dates back centuries.
According to research by experts of the Hangzhou Museum, which is based on the cultural relics unearthed from the Banshan tombs of the Warring States Period (475-221 BC), Changhua stones, in the Yue state, were mainly used for weapon-shaped ritual vessels, including sword heads, blades, vortex rings on the grip, cloud dragon patterns on scabbards, spears and daggers.
