First, Lan first met. When Cao Cao ordered the pursuit of the imperial seal, Lan targeted those who carried the imperial seal with them. After many days' searching, he finally found the trail on a ship, so Lan killed him in the form of a shark and was sent away by the general. Because Lan's skill is very high, later the general detonated the ship, and Lan was injured and unconscious. When he woke up on the island, Cai Wenji tried his best to heal him and then fell into a coma. At this time, Lan killed, took the jade seal and completed the task, but he didn't do it out of kindness, so the two began to be fettered.
Second, become brother and sister who depend on each other for life and death. When she woke up, Lan handed her the grilled fish in her hand. Lan wanted to find clues to leave the island alone, but she was always by his side, and she couldn't get rid of it. Lan will be trapped in a dark whirlpool and dragged into the abyss by the undead. At the most critical moment, Cai Wenji reached out to him and saved him from the dark heart. Lan was redeemed at that moment, and was later rescued by Cao Cao. Since then, the two have become lifelong friends.
Lan originally wanted to assassinate, but after being rescued, under mutual understanding, Lan gradually gave up his identity as an assassin and was willing to lay down his life to protect the story. Lan He is like brothers and sisters who share weal and woe. Kindness gradually melted the hard ice in Lan's heart, and Lan was rescued at the most dangerous moment. They became people who guarded each other all their lives, and such feelings were more touching than lovers.