Eight roads. . . . . . . . .

I recommend Master Kong Hai's video "The First Road of Ahan's Liberation". Although the Eight Righteousnesses are not directly explained, the original teachings of the Buddha have been sorted out, and a clear line can actually prove the practice ~ ~

In addition, Zongsa Jiangyang Qinzhe Rinpoche's Right View teaches the core words of the Buddha's "four dharma seals" ~ ~

There is also Gou Jialing's book "Be a Happy Man", which focuses on four thoughts. Very good ~ ~