High-end luxury brands carry an inherent prestige, and even if you're a top influencer, if your public image is seen as down-to-earth, you might still have no chance of endorsing such a luxury brand.
This was a fashion feast, and in the afternoon, a bunch of celebrities were gathered for a show, but the evening held a business dinner, inviting business figures. This wasn't a place just anyone could enter, apart from spokespersons, ambassadors for various lines, and a miscellaneous mix of preferred collaborating artists, as well as prestigious elders with clout and gravitas.
Xia Siyu was the brand's spokesperson for the Asia-Pacific region. The brand favored Xia Siyu for a simple reason: her English fluency, especially in Italian.
A high percentage of luxury brands hail from France and Italy, and she happened to be the spokesperson for an Italian brand.