Congrats! Did you do that on your own or with a teacher? I find it curious that you mix jhana which is normally from Theravada/mindful based techniques and concentration which is normally from Ch'an/Mahayana techniques.
I didn't understand your comment. What I meant is jhana is Pali, most Ch'an/Mahayana sources go back to sanskrit and thus spell it as dhyana. A Mahayana practitioner saying jhana is as odd as a Theravadin saying dhyana.