DEALING in Kader Investment and Kader Holdings was suspended yesterday morning as they prepared an announcement believed to disclose a backdoor listing by a mainland corporation. The announcement was cancelled at the last moment. The buyer might pick up a bargain thanks to the slide in the share prices of both companies since the fire last week at a 40 per cent owned plant in Thailand. Thai authorities yesterday were threatening to arrest Kenneth Ting Woo-shou, managing director of Kader Industrial Hongkong, unless he turned up for questioning within three days. Under outside advice, Kader has hired the Rowland Company as public relations consultants in a move highlighting the growing trend for specialised disaster planning.