Optimum Region (IMAGE) Science China Press Caption This image shows the optimum region (dashed area) when GTI ≥ 0.63 and GSI ≥ 0.96. Credit ©Science China Press Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.