Spavor’s detention seems to be the second in retaliation for the arrest of Meng Wanzhou, chief financial officer of China’s Huawei Technologies and the daughter of its founder, on Dec. 1. She has been charged with fraud and is out on C$10 million bail after a hearing in Vancouver, where a court is deciding whether extradition to the U.S. is warranted. She faces fraud charges in the U.S., where she allegedly hid ties to Iranian companies, putting U.S. firms in danger of violating sanctions.