According to Italy's La Gazetta dello Sport, the Scuderia was initially reluctant to do so.
Why ? Because letting Giovinazzi do more races for Sauber would make the 23-year-old hopeful ineligible for the 'young driver' tests scheduled for later this year.
Ferrari's intention was to run their reserve driver at these tests.
But given Pascal Wehrlein's fitness issues, and Giovinazzi's very good showing in Melbourne, having the young charger on hand in China has now become a necessity.
"That Giovinazzi will get another opportunity to drive for Sauber now becomes more real," said correspondent Andrea Cremonesi.
"Because Ferrari has decided to 'sacrifice' being able to use him in the tests after Bahrain."