The order of adjectives in the given sentence is wrong. Choose the option with the correct order:
They gifted the couple a Chinese porcelain beautiful vase.
We can use several adjectives to describe a single noun. But when we use adjectives of different kinds together they usually follow an order. The commonly followed order would be size, quality, colour, origin and substance. The noun in the sentence is ‘vase’; and the adjectives that describe it are ‘Chinese’ which denotes the origin of the vase or where it comes from, ‘porcelain’ which is the substance it is made of and ‘beautiful’ which describes the quality of the vase. Hence based on the order of the adjectives it has to be ‘quality, origin and substance’, i.e. ‘beautiful Chinese porcelain vase’. Therefore option B is correct, whereas options A, C, and D are incorrect.