In Flowers of Two Worlds, in the first world, Lu Xun and Yun Ying met and fell in love. However, due to various reasons, their love did not get a happy ending. The next year, Lu Xun met Yunying again, and then he really realized that he had always loved Yunying.
Yao Yao is a naughty boy in this work, and he doesn't have much emotional intersection with Lu Xun. So in this work, Lu Xun obviously loves clouds more.