Girl Under a Red Moon: Growing Up During China's Cultural Revolution by Da Chen

From Scholastic:

In a small village called Yellow Stone, in southeastern China, Sisi is a model sister, daughter, and student. She brews tea for her grandfather in the morning, leads recitations at school as class monitor, and helps care for her youngest brother, Da.

But when students are selected during a school ceremony to join the prestigious Red Guard, Sisi is passed over. Worse, she is shamed for her family's past — they are former landowners who have no place in the new Communist order. Her only escape is to find work at another school, bringing Da along with her. But the siblings find new threats in Bridge Town, too, and Sisi will face choices between family and nation, between safety and justice. With the tide of the Cultural Revolution rising, Sisi must decide if she will swim against the current, or get swept up in the wave.