J-11BSHs were already used to enforce the Eastern portion of the ADIZ, so the entry of the WS-10A into Chinese service shouldn't come as a surprise. It is only a matter of time before the Chinese would face the dichotomy of choosing either a domestic engine that can be produced at the whim of the military (albeit slightly worse reliability) or an import that comes with many strings attached, so I'd expect the WS-10 to see significant service even if it were crucially inept in regards to capability.
The missile load is standard for interceptions, and we have seen it before in other similar encounters.
A MAWS sensor, centered IRST, and black radome are common aesthetic marks of the "B" variant.
Of course it isn't a surprise, but it is nice to have another example of the engine in service, especially for missions where confrontation may potentially require aggressive maneuvering (as is the case with any air intercept), more or less confirming the PLAs confidence in its taihang equipped flankers, considering they have more than enough non taihang flankers to fill the void if there was a performance differential.
Previously I believe only Su-30s and 27s were photographed doing ADIZ patrols, and they were armed with fewer missiles than this, so no we cannot say the two MRAAM two SRAAM missile load is standard, based on photo evidence of previous ADIZ flanker patrols.
But then again our sample size of photos is fairly small, so whatever.
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