It is a story of the mixture of tears and blood, regarding the broadswords that the Chinese army used during the Resistence-Against-Japanese war.

https://www.ixigua.com/7347595121610719785?logTag=bfb04cec6f445d975ea4 

PS: I translated the ode to the broadsword in my previous posting at https://blog.udn.com/kkuo0810/174038406.