Due to its intrusive nature, APM Agent is difficult to deploy in core business systems in finance, telecommunications, and power industries. It is also challenging to instrument into cloud-native infrastructures. The Zero Code advantage of eBPF effectively addresses these pain points, making it a key technology for achieving observability in the cloud-native era. DeepFlow, based on eBPF, has provided universal views, distributed tracing, and continuous performance profiling capabilities to various industries. It has helped achieve Zero Code observability in distributed core transaction systems in the financial industry, 5G core networks in the telecommunications industry, distributed power trading systems in the energy industry, intelligent connected cars, and cloud-native game services, ensuring continuous innovation for the new generation of businesses and infrastructure.