The $5.5-billion Shanghai Disneyland is a colossal 963-acre park three times larger than Hong Kong Disneyland and anchored by the tallest castle in any Disney theme park. The joint venture with China-based Shanghai Shendi Group, which owns 57% of the park, is the glitziest in a spate of entertainment firms rushing to establish themselves in the world’s most populous nation, one run by a regime that increasingly views entertainment as a vital component of its soft power.