Hmmm ... Actually that's the first time I've hear of of a Type 226 for the J-8 (but to admit I've never heard of any specific designation of the J-8's rangefinder) ... but then this would mean that there are two Type 226 rangefinders ???
I can't say for sure, but everything I've read talked about a range finder specifically designed for the J8 as Type 226, which was a parallel project as the J8. The Marconi was always referred to as Skyranger in Chinese articles.