Found a Chinese Ch'an Master who clearly had insights into anatta, dependent origination and emptiness. John Tan and I thinks his expressions are good. He seems to have progressed from true self, one mind, into anatta and emptiness.
Ven. Chi Chern 釋繼程
Flipped through the following books:
https://www.ddc.com.tw/search_list.php?c=1&s=2&k=%E9%87%8B%E7%B9%BC%E7%A8%8B
默照365
禪悟之道
禪觀生死