Song Lingzhao has sent a letter.
The letter is not thick. He first asks about the family's well-being, then talks about his unfilial actions of leaving home privately and apologizes to Madam several times. When he returns, she can hit and scold him as she pleases, and he absolutely won't hide; the one who hides is a coward.
Besides some chattering about his life in the military camp, he reports his good news: he earned military achievements in a battle and is now a minor squad leader. Although it's a low-ranking officer position, it is still a government post, and he is very confident about his future.
After the letter, he once again inquires about the family's well-being and provides no additional information. He omits any mention of negativity or injuries, which is typically a soldier's habit to report good news but not bad.
