Apple CEO Tim Cook (right) does a fist bump with a man during Apple's annual Worldwide Developers Conference in San Jose, California, the United States, on June 6, 2022. [Photo/Agencies] Chinese app developers are emerging as one of the most innovative communities in the world, playing an important part in helping US tech giant Apple Inc build a thriving app store, industry experts and analysts said. There are now more than 5 million third-party developers in Apple's iOS app ecosystem in China, up from 4.4 million a year ago, and they are continuously creating new businesses and innovating, the US…