Visa exemption requirement in Shanghai

Hi, I’m planning to travel to Shanghai from Incheon transferring(by China Eastern) in Yantai(1.5 hour). Then spending about 2 days in Shanghai, I will fly(by Lufthanja) to Naples, Italy. After 10 days in Naples, I will fly to Shanghai(by Lufthansa) and transfer(by China eastern) to Korea(2 hour stay in Shanghai). In that case, do I need China entry permit to stay in Shanghai because of transfer in Yantai for 1.5 hour? Hope to reply soon and thank you in advance.