China. Zhongguo Renmin Yinhang / Chung Kuo Jen Min Yin Hang (People’s Bank of China). 1999-2005 Mao Issues. New security signs: Yellow Omron rings. 50 yuan Type 2005. Green and multicolor. Front: Mao Tse-tung at right, flora at lower center. Back: A beautiful scenic view of the Potala Palace in Lhasa. Watermark: Flora. Similar later note without Omron rings: Pick # 900.