Premier Wen Jiabao made some surprisingly reassuring promises at this weeks World Economic Forum in Tianjin to foreign corporate executives worried about the difficulty of doing business in China. But growing competition from domestic companies could mean that conditions remain tough for foreign investors in the years to come. Stefan Wagstyl, emerging markets editor, reports from China. Filmed, produced and edited by Deborah Bonello. This film was created for the Financial Times and published here: http://video.ft.com/v/609569431001/Better-rules-for-multinationals-in-China-may-not-help Less