I am flying eastern airline from Los Angelos to Haikou.
arriving Pudong terminal 1 at 5.30 pm.
the flight to Haikou is at 6.50 pm with Hainan airline which is
also in Terminal 1.

I need to go through immigration(I can do it as local as I do have a Hong Kong ID), then pick up luggage, then check in again with Hainan air.

Would there be sufficient time to do all that, in 1 hour and 20 minutes.
thanks