Much as manufacturers in the United States have transferred jobs to Latin America and just as Western European factories now look to Poland and Hungary, China’s modern-day capitalists are increasingly focused on wringing profit from Southeast Asia. They are tapping new markets for sales and farming out work to people willing to labor for less than at home and in even tougher conditions. In a global economy driven by the pursuit of lower costs and fatter profit — a drive that has led so many multinationals to low-wage China — Southeast Asia is emerging as China’s own version of China.