Finally, it appeared, things were back to normal. As nearly 3,000 delegates filed into Beijing’s Great Hall of the People on Tuesday for the opening of China’s annual legislative meeting, none wore face masks. Officials pressed together to shake hands and pose for photos. Around them, reporters and diplomats from around the world milled about the cavernous lobby, many invited back for the first time since the outbreak of the coronavirus pandemic four years earlier. It was one of China’s highest-profile political stages, and the message being sent was clear:…