I'm the General Who Guards the Nation. Why Are You Crying, My Aristocratic Ex-Wife?

"Chu Chen, here's your letter of repudiation." "From this day on, you are no longer a member of the Gao family...!!" Old Madam Gao declared furiously in the mansion's walled courtyard. Her face was broad and fleshy, her expression dark as water. Her cheekbones jutted out like raised graves, making one's heart turn cold. A man with sharp brows and bright eyes stood proudly in the courtyard. He was Chu Chen. This splendid mansion belonged to the renowned Gao family, one of the four great clans. As for Chu Chen, he was merely a lowly son-in-law who had married into the family. The synopsis is too short, so I'll add the title here: I'm the General Who Guards the Nation. Why Is My Noble Ex-Wife Crying?