System: My Doomsday Train - Chapter 25: "Built-in Fire Control System".

The person that Pei Zhen hates most in his life is the perfect Fu Sichen. Alas, life is full of surprises and unpredictability. One fine day, an accident turns Pei Zhen into Fu Sichen’s pet cat! As Fu Sichen’s pet cat, he makes a shocking discovery about his sworn enemy – a deep dark secret that the perfect Fu Sichen has kept hidden for years. Trapped in his cat body, Pei Zhen moves from one adventure into another while trying hard to find a way of turning back into his human self. When he finally does, the world as he once knew, has become a completely different place!

Lin Jiufeng transmigrates to become the Yuhua God Dynasty’s Crown Prince but is dethroned, banished to the Cold Palace, and imprisoned there because he had released the holy maiden of their rival country.

Lin Jiufeng isn’t dejected. He has brought a sign-in system with him when he transmigrated and he would receive rewards when he signs in at different places.

Before the Cold Palace’s gates, he signs in and receives the Ultimate Heaven Slashing Sword Skill!

In the Great Council Hall, he signs in and receives the Heaven Patching Technique!

In the Empress Dowager’s palace, he signs in and receives the God of War Totem!

…

Liu Jiufeng imagines that he can quietly sign in like this until he becomes invincible. Yet who would have imagined that the Heavenly Concubine whom he secretly released would rise in rebellion and seize power after she returns to her country?

After she succeeds, her first priority is to attack the Yuhua God Dynasty to rescue Lin Jiufeng.

When Liu Jiufeng hears of this news, he’s puzzled. «Do I need you to rescue me?»

On her engagement day, she accidentally had a one night stand with a stranger. Since then, she has been blindfolded and sent to sleep with him from time to time. One day, she found herself pregnant so she went to the hospital for an abortion. However, she was blindfolded on the operating table and sent to him again! Then, she discovered that the stranger was actually her ex-fiancé's uncle she met every day!“It's you!” She was so shocked.“Marry me. I'll deal with those who have bullied you and make them treat you respectfully.” He said.……Later, she asked him with her hands on the belly,“Darling, there is a question. What should our baby call you? Ex-uncle?”He remained silent.

Thirteen years ago, he became the abandoned child of the family, a waste despised by everyone. Eight years ago, he was hunted by enemies. After eight years of hard training, he returned with the divine dragon technique and unrivaled medical skills, determined to reclaim the dignity and status he lost, and to find the fiancée he had never met to fulfill the marriage contract.Fang Yu uses medicine as his path, a divine doctor with hands of holiness, capable of saving lives as well as taking them.