Oh, cool! I think it's definite canon-compliant possibility that when they first landed on Haixing, they were actually running away from something (which is how it plays out in my fic).

I had not paid much attention to those carvings on Ye Zun's pillar before! But looking at them now (and what the pillar seems to be made of), it looks like something that could have been in Stargate Atlantis. Like, it looks like a remnant from a long-ago very advanced civilization, with markings whose meanings have been lost.