July 1 (UPI) -- Two Chinese nationals made separate appearances in federal courts on Tuesday to face charges accusing them of acting as agents for the Chinese government. Yuance Chen, 38, is a permanent legal resident of Happy Valley, Ore., and was arraigned on charges in the U.S. District Court of Oregon in Portland and accusing him of acting as an agent of the Chinese government without notifying the U.S. attorney general. Liren "Ryan" Lai, 39, also is charged with acting as an agent of the