Why didn't Dongbao film Godzilla?

The copyright was sold to America. According to the inquiry website, Godzilla's copyright company Dongbao Company sold Godzilla to the United States in the 1970s, and Godzilla could not shoot. Godzilla tells the story of a sleeping ancient behemoth who was awakened unexpectedly. After waking up, the monster showed great destructive ability, and its existence also shocked the world.