It has become a trend among Chinese traveling abroad to go shopping for products such as iPads, laptops and cameras. The Christmas and New Year season will see more people from the Chinese mainland looking for bargains in Hong Kong and Macao, and other places. Ironically, most of the these products are made on the mainland. So why this craze? Because - ironically again - they cost more on the mainland. Take 16 gigabyte iPads, assembled in Shenzhen, Guangzhou province, for instance. Their launch price was $499 (3,326 yuan) each in the United States and HK$3,888 (3,336 yuan) in Hong...