Visa free from Finland to Hainan via Shanghai

I have a roundtrip Helsinki-Shanghai-Sanya Hainan-Shanghai-Helsinki. Staying at Shanghai is less than 9 hours, just because from Finland is not possible flight straight to Hainan. Finland citizen has a Visa Wiever at Hainan. And also Visa Wiever at Shanghai If I stay so short time there. Is it still Visa Wiever completely with this combination?