Students make the numbers 10 and 1 on Sunday at the Patriotic Education Center, established by the Hong Kong Federation of Education Workers, to mark the 73 rd anniversary of the founding of the People's Republic of China. EDMOND TANG CHINA DAILY The People's Republic of China is 73 years old today and Hong Kong is celebrating the occasion with due fanfare. The Chinese national flag and the Hong Kong SAR are both flying side by side in the many commemorative displays around town. From playgrounds to pedestrian walkways to digital displays along Victoria Harbour - wherever you look, red is the warmest color.