The monk Guangzhen (广真), active during the Tang Dynasty, is known for his commentary on the Vimalakirti Sutra (维摩诘经). His writings offer insights into the Mahayana understanding of emptiness and the nature of reality.
Collected Sayings of Chan Master Ju Yun Chui Wan Zhen (聚雲吹萬真禪師語錄)