Actually, Song Yuhang revealing his identity to Lin Shuangshuang was a bit of a request for help in escorting Ma Yuan, someone of significant combat power like Lin Shuangshuang. However, as a soldier, the instinct to protect the people was ingrained in his bones, making it hard for him to ask someone he considered an ordinary person, like Lin Shuangshuang, for protection.
If Ma Yuan weren't so important to the country, Song Yuhang wouldn't ask even at the cost of his life. Therefore, he only hinted at it implicitly without pushing further. Song Yuhang hoped that if Lin Shuangshuang was interested, she would offer on her own; if not, he would never force her.
As for Lin Shuangshuang's thoughts, she was inclined to escort Ma Yuan, or at least travel with him for a while, to enhance the capabilities of Song Yuhang and his team before leaving.
