C2485 Coral Snake
For a mere second-rate family head to call Zhang Hao "Sir" was completely reasonable.
However, Zhang Hao had already taken Lan Leilei in, and Lan Xutai was Lan Leilei's father. Thus, calling him "Uncle" was also reasonable.
After all, Lan Xutai was Lan Leilei’s father. Although Zhang Hao did not care about these mortal etiquettes, he would not be too casual in certain matters