Interroll Group, a Swiss manufacturer of products for material handling logistics and automation, such as rollers and sorters, said it remains confident on the huge growth potential in China and will continue to increase investments, triggered by robust demand from the express delivery market in the country. Later this year, the technology center of Interroll at Suzhou, Jiangsu province, will introduce a new German microelectronic roller assembly line and some advanced processing equipment for electric roller pipes, the company said. Besides, the Swiss firm will also set up a new office in Beijing, in addition to its current one in Shanghai, to provide more direct services to its customers in North China and Northeast China, to cater to the growing demand.