Here's a Mandarin version of the Wavin' Flag as rendered by Jacky Cheung and Jane Zhang with K'naan.
Qí Kāi Dé Shèng
(Jacky Cheung:)
Tòngkuài zìzài rèxuè péngpài
Bié wèn yóulái xīng kěyǐ zhāi
(K'naan:)
See the champions
Take the field now
Unify us
Make us feel proud
(Jacky Cheung:)
Tóu áng qǐlái chàng shuǎng kāihuái
Tiānyá bùguò nǐ wǒ xiōnghuái
(K'naan:)
Celebration it surrounds us
Every nation all around us
(Jane Zhang:)
Qīngchūn shì yī shǒu gē
Yíng zhe guāng ràng wǒmen yīqǐ chàng
Kàn shìjiè jiù zài wǒmen jiǎoxià
Bǎ mèng tī dào tiānjì wúxiàn dà
(Jacky Cheung and Jane Zhang:)
Yīqǐ chàng
Hàn ràng mèng zhuózhuàng
Nǐ ràng wǒ chéngzhǎng
Qí xiàng fēng chìbǎng
Nǐ gěi wǒ lìliàng
(Together:)
Flag
So wave your flag
Now wave your flag
Now wave your flag
Now wave your flag
(Jacky Cheung and Jane Zhang:)
Hàn ràng mèng zhuózhuàng
Nǐ ràng wǒ zhǎng chéng
Qí xiàng fēng chìbǎng
Nǐ gěi wǒ lìliàng
(Together:)
Flag
So wave your flag
Now wave your flag
Now wave your flag
Now wave your flag
(Jacky Cheung:)
Tòngkuài zìzài rèxuè péngpài
Bié wèn yóulái xīng kěyǐ zhāi
(K'naan:)
See the champions
Take the field now
Unify us
Make us feel proud
(Jacky Cheung:)
Tóu áng qǐlái chàng shuǎng kāihuái
Tiānyá bùguò nǐ wǒ xiōnghuái
Nǐ shì xiōngdì láizì sìhǎi
Xīn lián qǐlái wèi nǐ hècǎi
(K'naan:)
Staying forever young
Singing songs underneath the sun
(Jane Zhang:)
Kàn shìjiè jiù zài wǒmen jiǎoxià
Bǎ mèng tī dào tiānjì wúxiàn dà
(Jacky Cheung and Jane Zhang:)
Yīqǐ chàng
Hàn ràng mèng zhuózhuàng
Nǐ ràng wǒ chéngzhǎng
Qí xiàng fēng chìbǎng
Nǐ gěi wǒ lìliàng
(Together:)
Flag
So wave your flag
Now wave your flag
Now wave your flag
Now wave your flag
(Jacky Cheung and Jane Zhang:)
Hàn ràng mèng zhuózhuàng
Nǐ ràng wǒ zhǎng chéng
Qí xiàng fēng chìbǎng
Nǐ gěi wǒ lìliàng
(Together:)
Flag
So wave your flag
Now wave your flag
Now wave your flag
Now wave your flag
(Jacky Cheung and Jane Zhang:)
Yīqǐ chàng
Hàn ràng mèng zhuózhuàng
Nǐ ràng wǒ chéngzhǎng
Qí xiàng fēng chìbǎng
Nǐ gěi wǒ lìliàng
(Together:)
Flag
So wave your flag
Now wave your flag
Now wave your flag
Now wave your flag
(Jacky Cheung and Jane Zhang:)
Hàn ràng mèng zhuózhuàng
Nǐ ràng wǒ zhǎng chéng
Qí xiàng fēng chìbǎng
Nǐ gěi wǒ lìliàng
(Together:)
Flag
So wave your flag
Now wave your flag
Now wave your flag
Now wave your flag
(Jacky Cheung and Jane Zhang:)
Qíkāidéshèng wǒmen yīqǐ chàng
Shìjiè fèiténg wǒmen yīqǐ chàng