Neyney's Things

Hello, does someone know about this one bl isekai plot. I'm pretty sure it's chinese story, historical and colored. It's all about the mc got isekai and need to marry the I think soon to be emperor? I can't remember the whole plot but I remembered he created something like Eiffel tower, re-create the hotpot from the future, the gambling something like that.(๑•ㅂ•)و✧ pleasee help me find it