is the 144-hour visa transit applicable to the time in Shanghai and Guangzhou?

28.04.2019 - from RigaLatvia - arrive Shanghai 29.04.2019 (PVG)
29.04.2019 from Shanghai ( change airports to Hongqiao International ) to Guangzhou
3.05.2019 Guangzhou (Baiyun) to Manila (philippines)

13.05.2019 from Manila to Shanghai (stay at airport)
and then 13.05.2019 from Shanghai back to Riga Latvia

Thank you,