Mr Trinh Ngoc, a shoemaker in Saigon (Viet Nam) still working at the age of 90. He had studied at L'École ABC De Dessin School in Paris (France), and made a lot of shoes by himself. For decades in his career, Mr. Trinh Ngoc made shoes for the Royal Cambodian from the Queen to Prince Sihanouk and for many famous Vietnamese singers. When I asked him: What is the most important thing in your life? Mr. Trinh Ngoc answered: My life is very simple, I just think: If you create joy for others, you will receive double happiness.