Except he knows Zhao Yunlan is human, and he's met his father.
All that really tells him, though, is that Zhao Yunlan's originally from this time period. I think the gun and lollipops confirm for him that this isn't just someone who looks like the love he lost, this is his love, but he's still trying to figure out how and when the time travel happen/ed possibly right up until it does, and thus how much ZYL knows, and how much it's safe for ZYL to know. If he realizes ZYL hasn't traveled back in time before that point, and doesn't make the connection between Ye Zun looking like Shen Wei and being related to Shen Wei, he may think it's safer for ZYL not to know. Which, given Ye Zun's instability, is possibly the case.
no subject
All that really tells him, though, is that Zhao Yunlan's originally from this time period. I think the gun and lollipops confirm for him that this isn't just someone who looks like the love he lost, this is his love, but he's still trying to figure out how and when the time travel happen/ed possibly right up until it does, and thus how much ZYL knows, and how much it's safe for ZYL to know. If he realizes ZYL hasn't traveled back in time before that point, and doesn't make the connection between Ye Zun looking like Shen Wei and being related to Shen Wei, he may think it's safer for ZYL not to know. Which, given Ye Zun's instability, is possibly the case.