In the past, most of the official MVs and trailers tend to focus on Mo Xun/Xinyue. As you can certainly tell, I am 100% on board the Wei Wuji/Xinyue's shipping boat. The material focus on Mo Xun/Xinyue did not quite draw my undivided attention. This trailer is not entirely Xinyue/Wei Wuji-centric, but at least it contains additional footage of their interactions.
Hunan TV just released this short preview for Ep.1-4