What is the constellation of YeHua in to the sky kingdom TV series?

No one knows what constellation is in the TV series, because the drama is based on the novel of the same name written by the seven sons of the Tang Dynasty, which is about the love and hate between the three generations of Emperor Qian and Prince Jiutian in the Qing Dynasty. It was changed from a novel. Think about this. Neither a novel nor a TV series will involve such irrelevant details as what constellation YeHua is. But if you're asking about actors, I checked. YeHua Mark Chao should be a Libra.