Below is one of the best student descriptions of a good level of intermediate attainment of the practices and energetic results I've been writing about in my books. This man has been a long-time veteran student of both Tai Chi and Xing Yi, with several other teachers for some decades, and a hardcore fighter type also. By his report, he had no experience or understanding of internal power in my sense before happening onto my book Juice and subsequently taking some in-person training with me. This is his recent report. 'DT', in his way of writing, is dantian (丹田).