I would challenge anyone to make a bamboo stick less than the typical size of a perforation for a large bead (say 4 to 5 mm), well-formed and round in cross section, like a skewer, and as long as necessary for two people to hold the ends over some convenient safety container (to catch whatever glass would be spilled). This would probably have to be about five feet long. And once there were beads on it, it would be much heavier to handle.

I anticipate that the bamboo rod would sag rather quickly, or perhaps actually never remain straight.

I remain fairly convinced that the exposition suggesting this approach and task was either mistaken or misinterpreted the process. The whole thing could be due to a poor translation.