From 2001 year, Growthy have a first store in Huaqiangbei; after 7 years(2009), we build up our battery factory in Huizhou; and in 2014 year, we build up our power bank factory in Dongguan. The distance between Part A/B/C is less than 80km, within 1 hour driving times, but we save more than 20% cost because we are not establish them in shenzhen together, so that means You can use the same price order better products from us or You can get the lower price with the same quality products.