<sod >In the air, China last month said it had begun equipping combat units with its J-20 stealth fighter jet, the country's answer to fifth-generation jets such as the U.S.< eod>< sod > In the air, China last month said it had begun equipping combat units with its J-20 stealth fighter jet, the countryâs answer to fifth-generation jets such as the US F-22 and F-35.< eod>