A Bean I Can't Identify

[Wasteland + Escape + Little Ones + Age Gap + ???]

A group of children struggle to survive and make their way through the ruins (probably).

Aizi is just a bean. One day, he suddenly turns into a human baby O.O?

He saves a human boy, Qi Shi'an.

From then on, he joins the group on a perilous journey to find their uncle (?)