Li Qingzhao's "Summer Quatrains" is a modern style poem, which belongs to the "Five Character Quatrains" format of "the first sentence does not fit into the rhyme".
The so-called Pingqi means that the second word is Ping tone. The second word in the poem is "dang", which means "should", with a flat tone.
The so-called first sentence does not rhyme means that the first sentence does not rhyme, the second sentence rhymes, and the fourth sentence rhymes: Xiong, Dong.
Comparing the meter, you will find that there are some things that are not right. Specifically:
Being a hero in life will be a ghost in death. It should be: flat, flat, flat, flat. The reality is: flat, flat, flat, flat.
I still miss Xiang Yu and refuse to cross Jiangdong. It should be: 廄仄平仄, 平平仄仄平. The reality is: 廄平平仄仄, 平仄仄平平.
This is the "rescue" of modern poetry, which allows transposition of oblique and oblique places where the requirements are met.