Of all the warplanes in China’s rapidly growing air arsenal, it was an older model that sent shock waves across the region earlier this month. A rare stand-off between Chinese and Japanese fighter jets took place near the Miyako Strait northeast of Taiwan. The incident brought the Shenyang J-15 carrier-based fighter jet, which has been in service for more than a decade, back into the spotlight. Japan said J-15 fighter jets, launched from the Chinese aircraft carrier Liaoning, twice engaged their...