''To commemorate the 76th anniversary of the founding of the People's Liberation Army (PLA), the PLA Air Force released a short film titled "Lofty Dreams" on Tuesday. The film, for the first time, revealed footage of the GJ-11 stealth drone flying in formation with J-20 stealth''
guess some may need more than a short film of a flight in formation during a commemortion to call it ''it has become the first country to operationalize'' ??? just saying
They usually don't do it unless it is in service.
J-35 (its early prototype) was flying for years.
But this one is from few months ago after it entered service with PLAAF.