There are many different forms of jing with shenming or Tsa Pi Shiu Lin Jing as the highest form of jing where you sense the opponents jin and yi (intention) before is visible or manifested and you control and release your opponent with Yi (pure intent) or Shen only. (Thomas compilation from different sources)
At this stage the tingjin (listening) has refined into a kind of intuitive sixth sense, jiejin (recieving energy) has be cultivated, and the fajin (relaxed force) has become almost entirely internal. Like the ultimate in dongjin, when your opponents do not move but intent to, you have already moved ahead.
Finally comes the ability to issue without issuing, which is fajin (releasing the relaxed force) by a subconsious direction of the mind, and with out effort.(Taijiquan Wuwei: A Natural Process (okt 2003) Kee-Jin Wee p. 46)
You are able to sense the opponents chi and are able to pass chi into (fajin) or out of him (drain). Thus shocking his internal organs or disrupting his energy flow in the meridians (Dian Xue – pressure point). Understanding the opponents chi pattern with a light touch or without touching at all.
The passive aspect of this jing is the ability to sense the opponents intention (Yi) and resist his chi attacks. ( Advanced Yang Style Tai Chi Chuan: Tai Chi Theory and Tai Chi Jing: 1 (dec 1986) Jwing-Ming Yang p.104 )
Cover. To cover means that we use our chi to cover our opponents thrust.
Check. To check means that we use chi to check our opponents thrust, ascertain his aim and evade it.
Swallow. To swallow means that we use chi to swallow everything and neutralize.
These four character transmission represents what has no form and no sound. Without the ability to interpret energy and training to the highest perfection, they cannot be understood. We are speaking here exclusively of chi. Only if one correctly cultivates the chi and does not damage it, can one project it to the limbs. The effect of this on the limbs cannot be described in words.
(attributed to Wu Yü-hsiang)
Master Sam Tam are able to to spread the energy over you and prevent you from moving by “sinking the energy”. (Thomas)
Huang Zhen Huan