In the video, the ex can be seen clinging to the groom, while dangling from his arm and crying, a bit like toddlers do when they really don't want to go somewhere.
The former flame apparently burst into the ceremony at the point where the bride and groom were about to share a first kiss, throwing a meringue gowned spanner in the works.
Initially, the actual bride appears to keep it together quite well, as she looks down at the ex disdainfully. But eventually she quite understandably decides she has had enough and storms off.
Beyond this, we don't have much more context regarding this scene. It was originally shared by a blogger before being widely circulated by Chinese media outlets and going viral.
According to Star Video, the groom broke up with his ex-girlfriend because their personalities were too different, as reported in the Daily Mail.
The groom found himself in a very unfavourable position. Credit: Sina News
The ex reportedly shouted 'it was my fault' while she clung to the groom, and while an admission of guilt is normally welcome, you can't help but feel this particular concession didn't go down too well with the groom. Indeed, this seems to be a rare case of too much too late.
The master of ceremonies also reportedly did his best to keep things flowing throughout the interruption, saying 'we have an unexpected situation here', before adding 'perhaps this is the reality of love'.
No doubt that profound reflection provided great consolation for the bride and groom.
There was an outpouring of sympathy for the couple though on Weibo, which is basically like Chinese Twitter.
One person said: "Do not destroy other's relationship to satisfy your own obsession."
Another user said: "This is exactly why you can't be friends with an ex."
The bride eventually stormed off, and was well within her rights to do so. Credit: Sina News
A third viewer wrote: "This is more than inappropriate. From the stand point of the bride, how could the wedding carry on?"
'More than inappropriate' - now there's the best understatement of the day right there.
But if neither the philosophising of the MC nor the comments of Weiboers make the newlyweds feel any better about the situation, then perhaps they can take some comfort from knowing that pretty much exactly the same thing happened at a wedding in South Africa recently.
It's a niche kind of trauma, sure, but they're not alone.
Featured Image Credit: Sina News