1. Read and deeply understand the Java source code of the contract exchange, and master the core logic of the system Maintain the normal operation of the system, and quickly locate and repair issues related to system errors and alarms Understand the performance bottlenecks and carrying capacity of the system, and judge the system operation status based on business traffic and system operation indicators Optimize system performance, improve system stability and throughput 5 On the basis of understanding the original architecture, upgrade the trading system architecture to improve concurrency and scalability Expand system functions, add interfaces and features on the basis of the original system, and adapt to new business