Black Canopy boats are unique to the ancient city Shaoxing which was built 2,500 years ago during the Spring and Autumn Period.

Shaoxing, a city with 2,500 years of history built during the Spring and Autumn Period as the centre of the Yue Kingdom, where the best swords were produced in China.

Japanese General Iwane Matsui entered Nanjing, December 1937 https://viewofchina.com/why-nanjing-massacre-mastermind-not-prosecuted/