Climbing the ranks of the Communist Party while working in a coastal province, Xi Jinping ¡ª the man now leading China¡¯s push to overtake the United States ¡ª kept a poem on his desk that helps explain why he has fought back fiercely against U.S. President Donald Trump in their trade war.

The poem, a patriotic ode to the sanctity of national interest, was written by Lin Zexu, an imperial commissioner from Fujian, the same coastal province, who oversaw China¡¯s foreign commerce in the early 19th century. He is celebrated today in Chinese textbooks and speeches by Xi as a national hero for standing up to Britain, the superpower of the day, in a confrontation over trade.

That confrontation, triggered by Lin¡¯s efforts to halt opium smuggling, ended in disaster for China ¡ª a crushing military defeat that gave Britain control of Hong Kong and, in China¡¯s telling, started a ¡°century of humiliation,¡± a shameful stain whose removal Xi has set as one of his most important goals since becoming China¡¯s leader in 2012.