yes, china, kanada, japan is a good mining ranch place, but i think mining equipment also affects to income. if the mining tool is expensive then the income also reached $ 19000 every 2 weeks, and the cost of electricity paid even though expensive. so I see that if you want to get big profits from mining, then the location and tools should also support.
China was the place to mine Bitcoins because of the electricity and the weather conditions. Try to visit Hong Kong.