Let's start reasoning How did Cao's mother die?

Liu came down and killed him with pollen.

"Start Reasoning" is a variety show. Cao's mother is a character in the story. She was rich and allergic to pollen, and finally Liu Xia killed her with pollen.

"Let's start reasoning" is set in the bizarre apartment 1 1. In the preface, six new tenants with different identities came to the apartment, and gold intermediary Teng intermediary and administrator Xiao He greeted them as representatives of the professional property team. However, on the day of check-in, there was an incident of blood falling from the ceiling. The hidden secret of the apartment 1 1 led to speculation and reasoning.