In my understanding, the second amateur radio station in mainland China, operated by "Y," was a collective station, specifically "BY," which served as the main transmitter. The 2007 version of the "Regulations for Management of Amateur Radio Station Call Signs"There are also supporting pieces of evidence.
However, I recently saw..."Award for "Tonglian China School Amateur Radio Club""(WCSA)ofList of amateur radio stations in ChinaAmong them, many radio stations' second presenter wasn't Y. So I checked and found that...The current "Amateur Radio Station Call Sign Regulations"Article 2 simply states that the second amateur radio repeater and the second amateur relay station should use "R" as their callsign, without specifying that collective stations must start with "BY".
The second part of the amateur radio call sign, as assigned by the national radio management agency, consists of letters other than A, B, C, D, E, F, G, H, I, J, K, R, S, T, and Y. These remaining letters are reserved for use in amateur beacon stations and space-based amateur radio call signs. The second part of the call sign for amateur repeater stations is indicated by the letter J, while the second part of the call sign for amateur relay stations is indicated by the letter R.
So, does that mean that "collective station" doesn't necessarily need to include "Y" as the second element?