Reincarnation.
Ayao was born with a birthmark of a deer. As she grows older, many things that happened in her previous life gradually come back to her mind, including the days she spent with Yun Zhongjun, and the arrow she blocked for Yun Zhongjun in the end. Although the memory came back, Lu Ling never appeared until he met Lord Dong Huang by chance, and he told A Yao all the secrets...
Intention: writing and playing