Direct cause of the accident: unsafe behavior of people: 1. Miao ventured into Cui's dormitory and failed to correctly judge the bearing strength of the lighting tile. As the leader of the company, the director failed to stop Miao's dangerous behavior.

Unsafe state of things: the awning of illegal buildings has insufficient bearing strength.

Indirect reason: 1. The company illegally built sunshade buildings. 2. Employees have poor safety awareness. 3. As a leader, Zou turned a blind eye to employees' risky behavior, lacked safety management awareness and failed to play the role of safety supervision. The staff dormitory and office are in the same building. 5. Lack of safety management, entering unknown areas without consent.

Accident responsibility: Miao is directly and mainly responsible for this accident. Zou has the responsibility of safety supervision.