Bai Hao Yinzhen (Silver needle): The highest grade of the Bai Hao Yinzhen should be fleshy, bright colored and covered with tiny white hairs. The shape should be very uniform, with no stems or leaves. The very best Yinzhen are picked between March 15 and April 10 when it is not raining and only using undamaged and unopened buds. Fujian Province, China.