We hear O-Lan crying in the novel only twice: the first time is when Wang Lung takes away her pearls. Why did he take them? give two reasons

Wang Lung wants to sell them to buy land. The pearls are the only things that O-lan has ever been given: they represented that, at least for a moment, she was special.

Another reason?

She doesn't want to lose the only thing of any value that she owns. But I think the first reason I gave is the main one.