No, I'm making the broader point that it may not require a museum sign with a pointing arrow in order to possibly be understood.
>If there is no mention of Jesus on these stones, how does he know the designs are Christian? They could be Jewish.
I really haven't had a chance to examine the stones under laboratory conditions (nor have you) so cannot give the definitive answer you apparently and argumentatively seek. (You have to be loads of fun to be around.) Furthur, I am not qualified to make definitive judgements (nor are you) about what is or is not a Christian symbol of that time.
In that absence, I will either (1) accept theology professor Wang Weifans premise, based on his presumed authority, that some stone engravings demonstrate Bible stories and designs of early Christian times: or (2) assume a default position that they may be Old Testament stories of the Israelites, either Northern Kingdom or Southern Kingdom.
It would seem to me that, if these were Christian from that time, they would show more of the central story of Christianity, ie. Jesus on the Cross, Jesus and the apostles, the nativity, etc. If they show Old Testament stories, it would seem to me that they would more likely be Jewish (or lost tribe).