He/she can apply some documents from Canada consulate or embassy in China to get admission. It is called "travel documents for PR card expired". Check the immigration website. $ e+ W7 q* A% l. B* @- S+ Y3 o. o7 R) c& _; f
By the way, how did he/she apply for the renew? In Canada or outside of Canada? Did he/she apply by themselves or from friend? Thank you.