Where does "Better be a Warring States ghost than conquered people" come from?

This is what Kuomintang general Song said. Better die in war than be a conquered people.

Song Yuanzhe? ( 1885~ 1940)? Word Xuan Ming, Shandong Laoling people. When I was a child, my family was poor, and I studied hard. He joined the army from 65438 to 0908 and served as a sentry, company commander, battalion commander, colonel, brigade commander, division commander and army commander. 1925 to 1933 served as commander-in-chief of the army of Dutong, West Road and North Road in Jehol Province, chairman of Shaanxi Provincial Government and chairman of Chahar Provincial Government. /kloc-in the spring of 0/933, he led the 29th Army to fight against the Japanese in xifengkou and Tangu. Later, in a letter to Song, he praised "Mr. Yan is anti-Japanese, come on. Those who fought for it were entered by the Japanese invaders, and Mr. Wang struggled to resist aggression, spread it with the voice of justice, and respected China and foreign countries. " After 1935, he served as the garrison commander of Ping Jin, the mayor of Beiping, and the chairman of the government affairs committee of Jicha. After the Lugouqiao Incident, he swore: "I would rather die as a ghost than be conquered people". 1spring of 938, served as deputy commander of the war zone. He resigned after the onset of illness and died in Mianyang, Sichuan on April 5, 1940. The Kuomintang government posthumously awarded him the rank of first-class general.