can I travel like this?

HI,
-I travel to Shanghai on Sunday 1st May (i will use by single entry 30 day visa when entering)
-I then travel to Bangkok on Sunday 7th May
-I travel back to Shanghai on Sunday
-I then travel from Shanghai on the same day back to Germany (this is not a connecting flight).

Will the travel entry permit cover my entry into Shanghai only to comeback through the airport on the way out?