Recently at Panjiayuan I captured this photo of a head badge I didn't recognize. Later I was to find out it the bike is a Yongjiu, which is to say, a Forever. This may indeed be the oldest Forever I have yet seen. The frame and the lugs do not bear any resemblance to later Forevers. So, it may therefore date from before the mid 1950's. At that time, all the Chinese makes rationalized on the BSC standard and produced bikes with parts which, while not identical, were often interchangeable.
This Forever, however is different. The lugging pattern seems more similar to a period made Fuji. This would not be odd at all. Before the 1950's bikes were, of course, made in China. But they were built to a strange melange of standards. Some used British or Continental European standards, others Japanese. You can see this in the older examples of both Red Flag and Shuang Xi bicycles where the fender profiles emulated Japanese roadsters.
Even the granddaddy Flying Pigeon factory started as a Japanese enterprise, during the 1930s.
So what we may have here is a genuine survivor that is living up to the name Forever.