What are the three themes of Bing Xin's poems or essays?

One is to praise maternal love and innocence, Bing Xin, the first famous female writer in the history of modern literature in China. As soon as he entered the literary world, he was famous for preaching "the philosophy of love". The second is the worship and praise of nature. In Bing Xin's view, human beings come from and belong to nature, and they should live in harmony. The third is thinking and feeling about life, which we call "philosophical poetry".