their candy - Bing Tang Hu Lu
i would say people offer you to buy anything , dont buy it ,
although it cheap , compare to other place still expensive
beijing Badaling Great Wall ,when u start to climb , dont buy any
cert , plaque or souvenior , all very expensive !!!!!!!! walk all
the way to the dead end of the whole journey , the thing there are
much cheaper , and the stamp for certificate is real , oh... you
got to pay for the cert too 
Bring own water or little food along when visiting place of intrest
, they tend to sell drinks and snack expensive.
if you are going with a guide , they may not bring u to a wad wad
medical hall but will intro their medical cream , the say is
national treasure , call BaoShuLing cream. cost around 100rmb +-
for a small one ba. Cant confirm how good is it but no
recomended
1.u dunno where he get it
2.he promote thing mean he got comission earn = the price u buy is
altered higher (i may be wrong but usually it fake)
3.They may claim can cure alot thing , but u oso dunno got side
effect anot
There one shopping in beijing forget call wad name , but i can say
all are fake goods, the place u wan buy thing hor , must bargain
alot , eg. t-shirt 50rmb , u offer them 20 , they will argue and
then say not sell you , dont get taken by them , walk away tell
them buy other thing , the will put u back and negotiate again. My
friend buy thumbdrive from 2000rmb kill all the way to 300rmb, pro
ba
Other tips i recall liao then tell you.