Why does the old temple gold jewelery one gram of priced physical store is much more expensive than online stores

Why does the old temple's gold jewelry one gram of one gram of the priced physical store is much more expensive than the online store. Platinum is 498 per gram and the online direct store is only 396?
has a lot of difference in price, and I feel that I have bought a loss. o (唉) o ︶︿︶! Intersection Intersection Intersection