Hello, everyone. Today, we are going to discuss a crucial topic in the field of software development: why software needs maintenance even after its development is completed, and what exactly is involved in software maintenance. First of all, let's clarify one fact: software development is not a one - and - done process. Once we successfully develop a piece of software, we enter the maintenance phase. So, why does software need maintenance? Firstly, over time, the external environment and requirements change. New technologies emerge, business requirements shift, and user expectations evolve continuously. To keep the software in line with these changes, maintenance work becomes of great importance. Maintenance includes not only fixing bugs but also expanding functions and optimizing performance to meet users' new needs. Secondly, security is a vital aspect of software maintenance. With the continuous evolution of cyber - attacks and malware, ensuring software security is of utmost urgency. During the maintenance process, developers need to update security patches and fix vulnerabilities in a timely manner to protect users' data. So, what are the specific contents of software maintenance? First and foremost, we need to focus on bug fixing. Many users think that once the software is developed and launched for use, there should be no bugs. I believe many people share this view, right? In fact, bugs are inevitable at any stage of software development. Look at the apps on your mobile phone. Don't they regularly have update packages? This is because manufacturers are constantly discovering and fixing bugs, which is why you are required to update the software to the latest version. There is a joke in our software industry that programmers only do two things every day: one is writing bugs, and the other is fixing them. So, if you encounter bugs while using the software, don't worry. You just need to contact our liaison person, and someone will handle it. Whether a software company is reliable or good doesn't mean the software they develop has no bugs at all. Instead, it means that when bugs occur, you can find the responsible person in a timely manner and the bugs can be dealt with promptly. This is the most crucial point. The most important thing is to keep your software system running stably in the long term. Secondly, function expansion and update are also part of maintenance. As users' needs change constantly, to maintain the competitiveness of the software, we need to expand and update the software functions according to user feedback and market trends. Thirdly, performance optimization is also a very important part of maintenance work. With the increase in data volume and the growth of the number of users, the performance of the software may be affected. By optimizing the code and improving the software's operating efficiency, we can provide a better user experience. For example, we have a client. When the project was just completed, there were only a few hundred members and one server. Later, as their business gradually grew, the number of members reached more than 30,000, and the number of servers increased from the original one to two, four, five, and finally eight. During this period, server upgrades and code upgrades for performance optimization were all very important. As the client's market expands, the requirements for software performance become higher. Without good technical capabilities, the client's development will be affected by the software. Finally, security maintenance is an aspect that cannot be ignored. Timely updating of security patches and strengthening the protection of user data are crucial parts of maintenance work. After all, the end - result of software production is data. If the data is lost or damaged, the software loses its meaning. In general, software maintenance is an indispensable part of the software development life cycle. By promptly identifying and fixing problems, continuously updating and optimizing functions, and ensuring software security, we can ensure that the software can deliver maximum value in different environments and at all times. Well, I hope that through today's sharing, you all have a deeper understanding of the importance of software maintenance.