tā / zuó / tiān / jì / chū / yì / fēng / kuài / xìn / tōng / zhī / jiā / rén / zì / jǐ / yǐ / jīng / ān / quán / dào / dá

他昨天寄出一封快信，通知家人自己已经安全到达。

Yesterday he sent an express letter to tell his family that he had arrived safely.