In the fields of finance, electricity and telecommunications, it is very important to have a unified and precise time reference for all systems and equipment. However, common sense tells us that whether it is our watch or the time on the computer, the error is very large. Errors in system time are often fatal for these fields.

　　Regarding the significance of accurate timing in the banking system, Academician Yang Yuanxi, an authoritative expert in the field of satellite navigation, once made an analogy: "Suppose we borrow 200 billion US dollars from the United States, and we should repay it before zero o'clock today. If the time of our banking system is inaccurate, it will lead to We repay at 0.01 seconds, and the interest for one more day will be a huge number.”

　　In the power system, if the operating time of the power transmission equipment is not synchronized, the operating equipment will be out of control, affecting the normal transmission, and the power grid of the entire region will be paralyzed.

　　If the time of the telecommunications system is not synchronized, the telephone bills that the common people have to pay will always be a confused account.

　　Now banks, electric power, and telecommunication systems have successfully applied the Beidou system, and the use of Beidou's timing function can ensure that they have an accurate and synchronized time. The rubidium clock of the Beidou system can provide precise timing services with an accuracy of 10 nanoseconds.

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