信札

cóng zhè xiē xìn zhá de nèi róng lái kàn zhǔ yào fǎn yìng le dàng shí de lì shǐ huán jìng hé gè rén xīn jìng

从这些信札的内容来看，主要反映了当时的历史环境和个人心境。

From these letters, we can see history condition and personal mood at that time.