Wu Yuekai asked about Luo Er's family after hearing about their situation because he thought highly of Luo Xudong. He was a man who put the country first and couldn't sleep soundly even for a moment. He hoped to see a united family when Luo Xudong returned gloriously.
This was his way of protecting a soldier.
Wu Yuekai also had many questions on his mind. A few years ago, he had interacted with Luo Xudong due to a mission, and Luo Xudong had told him that arrangements had been made at home. But now it seemed that either things hadn't been arranged properly, or there had been many changes since then.
Or perhaps both!
Due to discipline, Wu Yuekai couldn't interfere with others' tasks or matters related to Luo Xudong, including his family. However, through Beisitian, he might be able to do some things within his capacity.
