He was condemned for generations because he betrayed his country.
Cantonese
卖国贼
賣國賊
maai6 gwok3 caak3
national traitor
Cantonese
通番卖国
通番賣國
tung1 faan1 maai6 gwok3
to collude with foreigners and betray the nation
Examples (Wiktionary)
Mandarin
卖国
賣國
mài guó
to betray one's country
Mandarin
用兵力来强压,来各个击破那些比较他们小的、愿意离开卖国贼而同我们联合起来打日本的力量。
用兵力來強壓,來各個擊破那些比較他們小的、願意離開賣國賊而同我們聯合起來打日本的力量。
yòng bīng lì lái qiáng yā , lái gè gè jī pò nà xiē bǐ jiào tā men xiǎo de , yuàn yì lí kāi mài guó zéi ér tóng wǒ men lián hé qǐ lái dǎ rì běn de lì liàng .
They will employ their armies to oppress and crush, one by one, all those weaker than themselves who want to part company with them and join us in fighting Japan.
Mandarin
关门主义在实际上是日本帝国主义和汉奸卖国贼的忠顺的奴仆。
關門主義在實際上是日本帝國主義和漢奸賣國賊的忠順的奴僕。
guān mén zhǔ yì zài shí jì shàng shì rì běn dì guó zhǔ yì hé hàn jiān mài guó zéi de zhōng shùn de nú pú .
In practice, closed-doorism is the faithful servant of the Japanese imperialists and the traitors and collaborators.