Imageless thinking is an active and purposeful operation of consciousness based on the image
data of its own active state. The most important characteristic of imageless thinking is that it does not
construct and operate the information image of things outside consciousness. One of the core operating
contents of Yikong skill is to enter the space, and to reach the space is to enter the imageless thinking.
Emptiness is mental space and time without problems. This paper illustrates the application of imageless
thinking in the Yikong skill with examples.