I suggest you buy one also. It's not just to let the baby used to sit in one place while eating, I've also seen an article say that research prooved BB that sit in highchair and eat with family together tend to be smarter and more patient as they grow. But I think since the highchair can be used for so many years I would buy one that's better for babies. I don't know why the highchair are so expensive in HK, I see the Graco brand selling in Canada is only like $60 CDN (about $400HKD) which in HK is like at least more than $1000 for sure