The bottom line is: Don't enter the gate for fear of death.

the whole union reads: "please go elsewhere for promotion and wealth, and don't enter the door for fear of death." The source of the couplet was posted on the school gate of Huangpu Military Academy.

It means: If you want to get promoted and get rich, please go somewhere else. If you are afraid of death, don't enter this door and become a student here. The entrance of the military academy faces the Pearl River from south to north. On the forehead of the memorial archway, there is a horizontal plaque of "Army Military Academy" written by Tan Yankai, a veteran of the Kuomintang.

Extended information:

At the opening ceremony of the first phase of Huangpu, Sun Yat-sen delivered a speech, saying, "From today on, make a wish, and for the rest of your life, you don't have the mentality of promoting to a higher position and making a fortune, but only know how to save the country and the people."

Therefore, there is a couplet at the entrance of the military academy: "Please go elsewhere for promotion and wealth, and don't enter the gate for fear of death." Under the influence of this thought, Huangpu students naturally become talents very quickly. Whampoa Military Academy is the product of the cooperation between the Kuomintang and our Party and the Soviet Union. In the previous enrollment periods, there were a large number of party member of our Party, and Sun Yat-sen's attitude towards them was also very tolerant, which made Whampoa Military Academy a clean stream in China at that time, especially when both countries sent a large number of military and political instructors as instructors, which was also an important reason why Whampoa Military Academy was able to turn students from mediocrity to magic in the previous periods.

Reference: Baidu Encyclopedia-Whampoa Military Academy.