The origin of the Shih Tzu is most likely Tibet, however, it has always been categorized as a Chinese breed.

The Shih Tzu, enigmatic and regal, and a glorious long, thick coat is a glamorous and beautiful canine.

The best breedings are generally those where the pedigrees have several outstanding ancestors common to both the sire and dam.

Tear staining can be from many different causes, genetics, environment, water, health issues.  Consult with your vet first to eliminate any physical causes, then proceed to the environment and water to help eliminate the stains.

An interesting fact about the Empress Dowager of the Chinese Imperial Palace is that there is only one known photo of her with Shih Tzu.