recommend interesting places in shenzhen and guangzhou

I would recommend Shenzhen Muslim hotel. You can buy silk at Guang Fu South Road or Friendship Department Store in Guangzhou. Historical places in Guangzhou: Ancestral Temple of the Chen Family, Huaisheng Mosque, Sun Yat-sen Memorial Hall and Shamian Island. In Shenzhen, you can go around Dongmen and Luohu for shopping besides visiting Window of the World, East Chinese Oversea Town, etc. in Hong Kong, you can go to Tsim Sha Tsui, Mongkok for shopping and arrange other attraction sightseeing acoording to your schedule.