Jing is concerned with the effect of your applications on the opponent.
Unless you affect the attacker in the required manner, the set will fail to work.
Every counter-attack must be executed properly.
If you can defend correctly, then each counter will finish-off the attacker.
You should also have compromised their structure and balance to an extent that forces the attacker to withdraw fully in order to re-attack.
Your aim is to be thorough and convincing against a full-power assault.