While the glass composition of some of them resembles Venetian recipes, the trace elements seem to distinguish beads of Chinese manufacture from either Venetian or Bohemian beads. However, the authors caution that the number of samples was low and that further analysis was necessary before drawing any valid conclusions.

As to the dates of these beads, and when they might have been made under the Qing - the late-19th century occupation of Shandong by Germany and then Japan seems to be an area worthy of research, given the resurgence of Boshan in the late 19th century as a glass manufacturing center.

ShanDong was a German protectorate in the early 20th Century, and in BoShan you can see traces of German influence. Some of the major non-Chinese companies in town are German. Siemens was one of the largest companies in town, but that German company sold their BoShan factory to GardnerDenverNash in 2005. The train station looks like a Bavarian building. And the town still has a few small restaurants who brew their own beer, German style.

https://en.wikipedia.org/wiki/Boshan_District