When will it be warmer in Yantai?

According to my years of experience, it is often very cold in May, haha. When I came to Yantai from Shanghai to play, I gritted my teeth and wore a pair of trousers and cloth shoes. Actually, it's okay It won't be cold if you endure it, hehe. Anyway, even in May, short sleeves will be worn in China, and Yantai should prepare long sleeves to prevent the temperature difference between day and night. Wear a down jacket or wool coat these days, and an ordinary thickness coat in April will be fine.