i'am going to stay in luogang wanda plaza ,and iam going to attend the canton fair

The best way is by metro. From Luogang Wanda Plaza, walk for about 200 meters to Suyuan metro station to take line 21 to Huangcun, then change to line 4 to Wanshengwei, then Haizhu Light Rail Line 1 to Canton Fair Complex East, Middle or West. Total travel time is about 55 minutes and ticket fare is CNY7.

3-day pass is available, however, since you will stay for more 2 weeks, it is suggested to apply for a transportation card directly. You can download the app to your phone, instead of applying for an actual card to save the trouble of refunding.

Thanks for help ,i think if the whole trip cost is 7 rmp its better to get the app but i dont know which app i should use ,and one more thing ,if i need to change egyptian currency to rmb where can i exchange it

There are many apps available, like offical Guangzhou metro app, or guangzhou transportation card app. You can ask the staff of your hotel to help you download it.

You can exchange the currency in any of the branches of Bank of China.