Tiger Leung has made a career out of cutting hair and giving clean shaves. For over 50 years, he has run his traditional barbershop in Hong Kong with a focus on an old-school approach to his craft. While similar shops have gradually faded away and closed over the years, Leung is determined to keep his business open for as long as he can. But today his customers are not only long-time clients who have become his good friends. Thanks to the attention his shop has received on social media, Leung's…