If your hair is brown, purple probably isn't going to show up very well. It's best to bleach your hair before dying it an unnatural color. Like I told you before, the box says 30-40 minutes, but the most I'd leave it on for is an hour. And that's at your own judgment, too.
But China's population statistics can be particularly misleading. Virtually overnight, Chongqing has become the largest city not only in China, but in the world, Time Magazine proclaimed in 2005. But it wasn't true-Chongqing is not the largest city in the world, or even in China.
The largest cities in the world by. land area, population and density. 6 January 2007: With the merger of core cities, suburbs and satellite towns into large metropolitan areas, the very largest cities in the world have in fact become megacities, i.e. cities with more than 10 million people.