tā / xí guàn / zài / xìn jiàn / mò wěi / shǐ yòng / jǐn qǐ / zuò wéi / jìng yǔ

他习惯在信件末尾使用“谨启”作为敬语。

He is used to using 'respectfully yours' at the end of letters as a polite closing.