So, what Han Dongchen worries about most is the personal safety of Su Xiaowan. Even though it's a new society, chaos abounds in the outside world. Without the ability to protect oneself, how could he be at ease with Su Xiaowan, a young girl, out there?
He originally thought of training Su Xiaowan personally in the evenings, but then changed his mind. This girl is very conscious of her image, which he has analysed and concluded over time.
Of course, his recent inspiration came from when he went to pick up Su Xiaowan from the train station.
Han Dongchen is now mischievous; certainly, Su Xiaowan would not foresee his ulterior motives. He intentionally had her train with the rookie soldiers, partly because he couldn't bear to train her harshly himself.
Another reason is that it wouldn't hurt for her to get a bit tanned. At least, when she first came to him, she was unnoticeable. But now, there are more people paying attention to her, which annoys Han Dongchen.