ECO is a technique that can be applied in later stages of IC designs to correct bugs or change designs by modifying the netlist (or mask metal layers) directly. The core algorithms of Easy AI-ECO have helped the team to win the 1st place in the 2012~2014 ICCAD International CAD Contests and is proved to be particularly powerful in doing arithmetic circuit ECOs. In today's newly developing GPU/AI chips, the arithmetic components are suddenly jumped to at least 60%~80% of the entire chip resource due to greater computing demand, which makes AI-ECO a perfect alternative for their need.