Core Viewpoint - The article discusses an incident involving Air China flight CA1253, which had to return to Beijing due to mechanical failure, highlighting operational challenges faced by airlines [1] Group 1: Incident Details - On July 3, Air China flight CA1253, a Boeing 777-39L (ER), was scheduled to depart from Beijing at 12:50 PM and arrive in Urumqi at 5:10 PM [1] - The flight took off but returned to Beijing after more than an hour due to a mechanical failure, as confirmed by a customer service representative [1] - The flight was rescheduled and took off again at 6:02 PM, arriving in Urumqi at 9:35 PM [1] Group 2: Customer Experience - A passenger shared their experience on social media, indicating dissatisfaction with the situation and the communication regarding the flight's return [1] - The customer service representative clarified that the return was due to Air China's reasons, not weather-related [1]