Jing is one of the three treasures. sometimes called “essence” or “vitality ” It is really what we are and something that you need to really look after.
Pre-natal Jing (congenital Jing) influences our constitution and we receive this from our parents. Once it is used up it is the end of our lives. postal- natal Jing (acquired Jing) can be obtained from obtained after we are born, through foods and improving our over all lifestyles.
Jing is stored in the kidneys and can show as either yin jing deficiency or yang jing deficiency. Ying jing and yang jing always influence each other. so it is important to support both in a different degree to bring in the balance.
watch me here explaining about Jing
https://www.youtube.com/watch?v=Y94nlex4Yts