Hi Huitong, there's been some discussions about J-20's databus over on SDF, specifically in regards to your J-20 section about it using an "advanced optic HSDB".
When you say "HSDB" are you referring to general "high speed data bus" or are you talking about the specific MIL-STD-1773 data bus, which is an optic databus that has a formal name of "HSDB" as well via the SAE standard? In other words, are you saying that J-20 will use the MIL-STD-1773 data bus, or merely that it will use a data bus which is high speed, advanced, and optic?
Also, where did you come across this information, was it from BBS/big shrimps or was it your own assumption/deduction?
That was one of the speculations I picked up somewhere (probably at cjdby.net) many years ago. So far I have been unable to verify it. BTW Optical HSDB is just a general term, currently Chinese should have the capability to develop such technology.