I wanna know if I need a transit visa o I don't need any type of visa for this connection.

Good afternoon.

I'm from Colombia and my passport is from Colombia. Actually I'm living in Sydney Australia with student X. I'm buying a ticket to Switzerland but it has a stop in PEK Beijing for 8 hours (Sydney to Switzerland) and 13 hours (Switzerland to Sydney). Because I'm not planning to go out of the airport.

Thanks for your help.