Yu Qian's Thoughts on beginning of spring in Ming Dynasty means "I sincerely serve my country; Being in a foreign land, I can't help crying when I think of my loved ones. "Dan Xin: A sincere heart. This sentence shows the importance attached to state affairs and often suffers from homesickness. " "One inch" means "two lines", "Dan Xin" means "clearing tears", "drawing" means "doing" and "serving the country" means "homesickness". "Since ancient times, loyalty and filial piety are hard to tolerate.