He works for over 3 nights, and he is very tired now.
Examples (Wiktionary)
Mandarin
疲乏
疲乏
pí fá
tired
Mandarin
疲倦
疲倦
pí juàn
exhausted; fatigued
Mandarin
乐此不疲
樂此不疲
lè cǐ bù pí
to never get tired of it
Mandarin
他会累得精疲力竭的。
他會累得精疲力竭的。
tā huì lèi dé jīng pí lì jié de ．
He'll wear himself out.
Mandarin
也有这样的一种人，他们对于人民的事业并无热情，对于无产阶级及其先锋队的战斗和胜利，抱着冷眼旁观的态度，他们所感到兴趣而要不疲倦地歌颂的只有他自己，或者加上他所经营的小集团里的几个角色。
也有這樣的一種人，他們對於人民的事業並無熱情，對於無產階級及其先鋒隊的戰鬥和勝利，抱着冷眼旁觀的態度，他們所感到興趣而要不疲倦地歌頌的只有他自己，或者加上他所經營的小集團裏的幾個角色。
yě yǒu zhè yàng de yī zhǒng rén ， tā men duì yú rén mín de shì yè bìng wú rè qíng ， duì yú wú chǎn jiē jí jí qí xiān fēng duì de zhàn dòu hé shèng lì ， bào zhe lěng yǎn páng guān de tài dù ， tā men suǒ gǎn dào xìng qù ér yào bù pí juàn de gē sòng de zhǐ yǒu tā zì jǐ ， huò zhě jiā shàng tā suǒ jīng yíng de xiǎo jí tuán lǐ de jǐ ge jué sè ．
There is a type of person who has no enthusiasm for the people's cause and looks coldly from the side-lines at the struggles and victories of the proletariat and its vanguard; what they are interested in, and will never weary of eulogizing, is themselves, plus perhaps a few figures in their small coterie.