Addictional informatio n (Wiki):

Tonkinese are a medium-sized cat breed distinguished by points as with Siamese and Burmese breeds. They are lively, friendly, often talkative cats, with gregarious personalities. But they are happy apartment cats if they have some exercise opportunity. They are commonly referred to as 'Tonks'. As with many cat breeds, the exact history of the Tonkinese varies to some degree depending on the historian.

Tonkinese cats are commonly trim and muscular cats. They are typically heavier than they appear to be, due to their very muscular bodies. They have a distinctive oval-shaped paw, and a modified wedge-shaped head, with large ears set towards the outside of their head. They are unusually intelligent, curious, affectionate with people, and interested in them. Tonks are playful cats, but not hyperactive, although they can be mischievous if they become lonesome or bored. Some interesting toys and a cat tree, or, better yet, another Asian cat such as a Tonkinese, Oriental, Burmese, Siamese, or Snowshoe will keep them occupied when you're not around. Unlike most breeds of cat, they are reported to sometimes engage in fetching, and they can often be found perched on the highest object in the house. Do not be alarmed if your Tonkinese jumps on your shoulders, as the breed is known for its love of heights.