Hello Yi Kai,
i am not sure what the question means "How to glue it"
If you need a tip what kind of glue you should use, then the question is:
Did you laquered the Chines and the Frames ?
If yes then you need a 2K Epoxy glue (in Europe there would be "UHU Endfest 90 Min" a possibility)
If no (only stained) then you can use waterresistant woodglue ("Ponal Wasserfest")
If the question was how to fix it to the chines, then look at Andy's Build Log
Andy's Pictures how to fix
The bottom could be fixed with some iron weight or with adhesive tape wrapped around the raw construction.
Sometimes it makes sense to split the glueing into two separate jobs for the bottom.
First the flat part and then the round part.
Best Heico