Software matters for deep learning computing platform. A product in edge relies on not solely neural networks and usability of software eco-system tends to be the crucial competitive factor. In this talk, we will introduce our Tingtao SoC based on Aristotle V2.5 core, the breakdown of runtime on Tingtao for real applications, and our software toolchain DNNDK, which combines compression, programming, compilation, and runtime support. Tingtao achieves 4TOPS/3W energy efficiency with TSMC28 process. Products on FPGA with same architecture have been widely used in applications ranging from security to automotive industry.