1) you will have study visa, 2) you will make many friends , 3) everyday have intensive Chinese languages programs , like a listening , speaking writing , Chinese history classes . read more
In addition, schools in Guangzhou started to teach in Mandarin. Because of the Mandarin movement executed by the central government, all schools have to teach in Mandarin. Therefore, the young in Guangzhou speaks Mandarin and some of them cannot speak Cantonese even they are born in a typical Cantonese family. read more
You can buy a Mandarin phasebook, as learning Cantonese, with nine tones, is harder than learning Mandarin, with only four tones. But you will learn some Cantonese phases after staying in Guangzhou for three months. read more