Paris-Shangai-Bangkok with different carriers

Guys,

Could you please help me? I have a one day fair visit in Shanghai in September. I will fly from Paris, and my back route to Europe will be from Bangkok (a few days rest). Both routes will be with Air France. I have a booked flight from Shanghai to Bangkok with a chinese airline.

Do you think I'm able to get a 144 hrs twov?

Kind regards,

Gelege