The black "thing" attached to the pylon is the same ones as on J-10Y, may be a color smoke dispenser. Pre-delivery J-10A/B/S would normally carry a pair of red color dumb air-air missiles.
If there's something up with the new J-10Bs, I think they are likely undergoing classified testing/combat readiness training rather than participating in the parade.
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If there's something up with the new J-10Bs, I think they are likely undergoing classified testing/combat readiness training rather than participating in the parade.