Does Pakistani need transit visa going from Taipei - Karachi via Shanghai layover less than 24 hr?

Hello I plan to travel to Karachi-Beijing - Qingdao - Taipei -Karachi. I have been given a single entry which will be used once i reach Beijing. After my Beijing /Qingdao visit i plan to travel to Taipei for a few days.Since im flying on Emirates back to Karachi I will have to travel Taipei to Shanghai and take the Emirates flight back to Karachi. Please advise if this is possible if my stay at Pudong airport is less than 24 hours? Thanks in advance.