Hong Kong customs has arrested a man and seized HK$42 million (US$5.3 million) worth of the illegal narcotic “space oil” from a drug workshop fitted with a semi-automated production line capable of producing up to 160,000 cartridges in a short period.Senior investigator Chan Kit-lun of the Customs and Excise Department’s drug investigation bureau said officers intercepted a suspicious man on Tuesday and escorted him to a property in Kam Tin, Yuen Long.Inside, they found more than 3,000...