Who am I, who do I depend on, and whose speech is this?
Comrade Liu Yunshan once published an article "For Who, Depend on Who, Who I am" in Qiushi magazine.
"For whom" is a question of purpose, "Who to rely on" is a question of method, and "Who am I" is a question of position. Answering questions such as "for whom", "on whom" and "who am I" is a compulsory course for us to deal with practical problems.