A happy couple exchange a kiss for the camera, the bride in a white off-the-shoulder dress holding a delicate bouquet, the groom in matching white suit, standing together on a green lawn lined with pink blossom. It looks like the perfect wedding memory -- except it's not their wedding day. Instead it is part of a booming industry in China for increasingly elaborate pre-wedding photos, as young couples spend time and cash lining up glamorous photo shoots to display on their big day.