Swedish passport, from Seoul to Xiamen then Xiamen to Amsterdam, 1h30 layover.

How long does it Take to get from one flight to the next? Will I make it in 1h30 min?

If the flight gets delayed and I miss My next flight, What gapens then?

Also, from Seoul to Xiamen to Amsterdam, it Will be less than 24h, do u apply for direct transit visa? What do I have to do to make sure My transit is as Quick and effective as possible?