Hi, could you please advise if I will be eligible for the visa-free transit for my upcoming trip?

I have purchased a ticket from Stockholm to Shanghai (two-way) and will soon also purchase a ticket from Shanghai to Phuket (two-way). On my way back I want to stop in Shanghai for a couple of days but I wonder if it is still ok if I have purchased my two tickets from two different vendors and will then only be able to show an e-ticket for my flight out of China? Many thanks in advance!