why is wang lung now cursing the gods

With his son married and his dead buried, Wang Lung consults Ching about the status of his land. Ching tells Wang Lung that the floods are once again upon them, at which news Wang Lung curses the gods. Ching tells him to be careful with blasphemy. Meanwhile, the village is woefully unprepared for the coming flood, as the official who was supposed to fix the dyke instead spent the money on his house. When the villagers arrive at his door he kills himself.