I do not have enough information to answer this query. The provided documentation contains details about various incidents in or related to Chengdu—such as the 2018 windshield blowout on Sichuan Airlines flight 3U8633, a drone crash on the Chengdu–Kunming railway in 2024, and the 1999 bombing of the Chinese embassy in Belgrade that led to protests in Chengdu—but it does not contain any specific information regarding an event or entity known as "Chengdu 46." Please provide more context or clarify if you are referring to a specific flight number, a historical event, or a different organization.