CHUNCHEON, Gangwon Province – A tube thinner and shorter than a thumb, holding what looks like little more than a drop or two of clear liquid, sat locked inside an ultralow-temperature freezer at minus 80 degrees Celsius in Building A of Hugel’s Geodu factory in Chuncheon, Gangwon Province, on Thursday. “That tiny tube is enough to produce more than 25,000 vials of botulinum toxin,” said Seol Hee-soo, managing director at Hugel. That little tube was among the most tightly guarded assets inside H