Three simple ways to identify the authenticity of Hong Kong dollars: 1. Paper quality and safety line. The paper used in real Hong Kong dollars is hard and tough, and there is a safety line in the interlayer of real banknotes. A micro-letter security line has also been added to HSBC's banknotes. The word line consists of HSBC, and two miniature stone lions are at both ends of the security line. Hong Fake Hong Kong dollars are very rough when manufactured. ? Second, look at colors, lines and patterns. The color of real money printing is very bright, it is not easy to fade, the grain is clearly visible, the mesh is regular, and it will not break halfway. At the same time, the banknotes issued by HSBC are all marked with perspective, and the engraved lace pattern in the blank on the right side of the front of the banknote will be exactly the same as the solid lace pattern on the left side of the back under ultraviolet irradiation. There is a hexagonal logo of HSBC printed in yin and yang on the lower right corner of the front of the real banknote. When you look at the same position of the logo on the left, you will find the hidden banknote number. ? Third, distinguish purple light. The lion's head watermark in real banknotes is clear, and it has a special effect to observe its fluorescence under purple light, while the lion's head watermark in counterfeit banknotes is blurred under light. Observing under the purple light, the whole banknote is bluish white, and there is no ambiguity in denomination and number.