Need to buy laminated good quality maps of China, Beijing and Xian. I need maps in English. Would you recommend any shops in Beijing and Xian?
Quite near the Forbidden City is the Foreign Language Bookshop, which I always visit when in Beijing. I am pretty sure they sell maps, absolutely sure they sell a very wide range of English source material, and don't know whether they do laminated maps. Do bear in mind that maps of China may be restricted in various ways -availability; production in English; restrictions on who they can be sold to. I am not aware of anything similar in Xian.
In Beijing the Wangfujing Bookstore sells a wide variety of maps. In 2012 this was on the ground floor, directly to your left after you enter the store.
In beijing I would recommend to go to the public library which is right in the center of the town.
They have everything in any language you might think!