The Pampered Man of the Republic of China: the Clingy Young Commander Can't Get Rid of Him at All

The young lady who studied abroad x the warlord marshal [Sinister, sweet pet, conspiracy, espionage, romance of the Republic of China, suspense reasoning, investigation] On the day I returned from studying abroad, Lu Tingjun came to humiliate me. My grandfather took me to Peking to break off the engagement in anger. He was assassinated on the way and I saved his life. Who told his mother to die early? My father didn't like his stepmother's harm. When I arrived in Peking, I thought I could go back and continue my studies after breaking off the engagement. Unexpectedly, I came to Peking this time to find out the truth about his mother's early death... Who killed the entire Song family?