Like a longer list of innovations, this book covers everything from lasers and performance modulations of lasers to laser precision measurement instruments that the author’s team have been working on for 35 years. This is the result of the collaborated research by a total of about 100 faculty members, postdoctoral fellows, doctorate candidates, and graduate students over the years. It is safe to say that this book promotes the technologies created by the Chinese people and introduces the instruments of the Chinese. Although many instruments are introduced in this book, they come from the same origin and are closely interlinked, which have formed their own system.