赤心报国

Explanation: Red: fire red, really pure metaphor; Chixin: loyalty; serve the country: for their service. Old refers to the faithful service of the emperor. Is also described the utter devotion, to serve their country. 　　Source: "Zi Zhi Tong Jian Jia Chen Ji Wendi days the first year," Yin Tai Yan Yue 'kings inverses, Yusha good people evil! Respect for the emperor, princes cut, Chi Xin to serve the country, what is wrong there! '" Thesaurus:  die for one's country, Obsessions forget home