You really wanna know spoilers? If so then
Basically, the MC will have a fight against the Tang head where has to endure 10 attacks of the Tang Head. At the end, when MC survived through all attacks and the last one was dodged, a sudden hidden weapon attacked MC and caused him to be injured severely. This weapon was thrown by the Tang Head's Eldest son and the heir. Tang Head became furious at this dirty play and was angry at his son, he took in the MC for healing. Long story short, the two (MC and Tang Head) become pals and Tang Clan helps them go to Yunnan.
Oh and Tang Family power is held by the Tang Head and Tang Elders. MC fights against some guy for the Tang Elders and this let's Tang Head get the power.
He’s gonna be friends with the tang family and literally give back the power to the head of the family