yeas in the novel the weeding happen off screen in the story. they do mantion they did all the steps of getting married, but it never show to us the actuall wedding party in the novel. we can only assume they had a party with their friends. but they totally married, since they do all the steps to be married couple. in this story you don't really need a priest to be married XD
The wedding happens off-screen in the novel. It does require some explanation though. In traditional Chinese weddings, the three prostrates are gestured to three different entities. First to the sky and the earth, second to the ancestors (which includes the parents), and third to your partner. WeiYing and LanZhan technically completes the first two at Madame Yu and and Uncle Jiang’s memorial, so they could have very well completed the last part of the ceremony on their own in a very minimalistic way. It’s a little disappointing I know... I actually read a very well written fan fic in the form of an arc regarding what an elaborate ceremony would be like for them just to satisfy that curiosity. It was beautiful btw.

I have a question. I’ve seen people saying about Wei Wuxian and Lan Zhan’s wedding but I’ve already read all the chapters updated in ExiledRebels and have never seen any details regarding a wedding. In the Banquet Extra, there’s a mention that they’re already partners in cultivation. Is the wedding just explained vaguely in the story or is there a separate chapter where it’s not combined with the main story and extras?