What to buy at "Yaxiu Shopping Complex" and "Wangfujing Street" in Beijing?

my tour will be bringing me to "Yaxiu Shopping Complex" and "Wangfujing Street" ..what can i expect to find/buy there? will they be selling mainly winter wear (for clothes/shoes)...will i have the chance to get 'summer buys'?

what else can i buy there? :)