Undated file photo shows China's J-20 stealth fighter jet takes off for a night confrontation training mission during a coordinated tactical training exercise with J-16 fighter jets and J-10c fighter jets in an effort to boost the PLA Air Force's combat capability. [Photo/eng.chinamil.com.cn] logo wristbandscustom silicone wristbandsballer bands24hourwristbandsrubber bracelets cheapprintable wristbandsadjustable wristbands
