Yeah, it looks like the main evidence is that there’s a mention of a similar formation to testudo being seen in western China a couple decades later, and maybe some Roman-style fortifications. According to Wikipedia a large number of prisoners were sent to Merv somewhat nearby, so it’s all very suggestive, but definitely no smoking gun.
Is it? Oh, I didn’t realise. I’ll cross that out.
Yeah, it looks like the main evidence is that there’s a mention of a similar formation to testudo being seen in western China a couple decades later, and maybe some Roman-style fortifications. According to Wikipedia a large number of prisoners were sent to Merv somewhat nearby, so it’s all very suggestive, but definitely no smoking gun.