in ill health
The disease of collecting firewood, a Chinese idiom, Pinyin is C ǎ IX ī nzh ī J í, which means you can't collect firewood when you are ill. A euphemism claiming to be ill. From Mencius Gongsun Chou Xia.
The origin of Idioms
Mencius: "in the past, there was a king's life, and there was a worry about collecting salaries, so we could not build a dynasty." Zhu Xi's annotation: "the worry of collecting salary is that we can't collect salary if we are sick." The later reason is "the worry of collecting salary" which refers to illness.
Word usage
In the first place, every one is ashamed of stealing food; in his hometown, he is in mourning, and in heavy poverty. (Wang Anshi's Ci Shen Zhi Zheng Shi Biao, Song Dynasty)
in ill health
fail to find a solution due to grievance - dào xīn shī tú
go into boiling water and walk through fire and water - fù tāng dǎo huǒ
iron walls and brass partitions - tiě bì tóng shān