Radar Echo (IMAGE) Science China Press Caption Radar echo of a squall line passed over Beijing from northwest to southeast, and the boundaries of Beijing is indicated by the black lines. Credit ©Science China Press Usage Restrictions Use with credit. 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.