The government had cleared the deal on Sept. 8 but Aixtron said that the Economy Ministry had now canceled the clearance certificate for Fujian Grand Chip Investment Fund LP (FGC), a Chinese investment fund controlled by businessman Zhendong Liu, and planned to reopen a review of the takeover. The decision to rescind the approval was based on “previously unknown security-related information,” Germany’s Deputy Economy Minister Matthias Machnig told German daily newspaper Die Welt, without being more specific.