The Tang family, controlling shareholders of GKC Holdings, has been served with a writ by a securities firm seeking to recoup $2.5 million. Brothers Eric Tang Yiu-hong and Eugene Tang Yiu-chuen are being sued by HT Securities, according to a writ filed at the High Court. As directors of China Investments Assets, the brothers were granted credit facilities under a margin agreement with HT Securities on June 9. The following day, $2.4 million was advanced to China Investment Assets, the writ says. On July 6, HT Securities requested full repayment of the sum with interest. The writ states that in breach of the margin agreement, China Investment Assets failed, and/or refused to repay the amount, or any part of it. As of August 31, the sum owed amounted to $2.5 million. HT Securities is seeking further interest and costs. Last month, the Tangs, who have been hit by a wave of litigation recently, were arrested by the Commercial Crime Bureau amid accusations of fraud. No charges have been laid.