Is the word engraved on Yue Fei's back "loyal to the country" or "loyal to the country"?

Is the word engraved on Yue Fei's back "loyal to the country" or "loyal to the country"? This has yet to be studied. People also have different views on these words. As far as we know, the word loyalty to the country is familiar, but many people flatter it.

In Chapter 22 of The Complete Biography of Yue Fei, there is a story. In The Legend of Wang Zuo, the pseudonym of Jieyi League, the author also vividly describes this classic scene.

In this biography of Yue, there is a wonderful description. Yue Fei's mother wrote the words "loyal to the country" on the spine of Yue Fei. Yue Fei's mother asked Yue Fei if it hurt. Yue Fei said, his mother hasn't been stabbed yet. How can he ask his son if he hurts? Yue Fei's mother said that I was afraid that I was soft-hearted, so I said it didn't hurt. Then bite a tooth and stab, and finally the vinegar ink on the picture will never fade.

In this classic bridge, the well-known loyal gentleman appeared. But in the following clip, Yue Fei's mother exhorts Yue Fei to say: Today I want to drink your glass of wine for my mother, hoping that you can serve the country, but you still don't forget your hometown in the frontier, so that you can faithfully serve the country and go down in history. My wish is here. Remember, don't forget. Here, loyalty to the country becomes loyalty to the country.

Yue Fei is a well-known hero against gold in the Southern Song Dynasty, I think.

Yue Fei's back is engraved with the word "loyal to the country". Because the words tattooed on Yue Fei's back are true in history, it is likely that Yue Fei's mother encouraged her son to go to war, but it is said that it was not carved by Yue Fei's mother's novice.