Onward flight is on a separate booking - need to collect luggage and re-check in for second flight

I am have both UK and Australian passports and will be flying from London Heathrow to Shanghai Pudong, and am then booked on a separate ticket with another airline from Shanghai to Adelaide (the onward flight is later the same day).

I'll need to collect my luggage in Shanghai and check-in to the second flight with Singapore Airlines. Will I need a visa to collect my luggage and change terminals etc. to make it to my next flight?