The Hunyuan Chen Shi Xin Yi Taiji derives from the Chen style Feng Ziqiang learned from Chen Fake and coupled with the Qigong and Xin Yi Liu He from Hu Yaozhen it makes a very interesting and complete system.
Training starts and for most people ends with learning the 24 step form which is beneficial for health but has martial applications contained within, this along with the 24 Qigong is enough for most people and certainly when I learned in Beijing the majority of people were happy just to practise these everyday and got tremendous health benefits from the practise.
Originally I came to Hunyuan to learn the Qigong for a herniated disc and when I started I was still taking medication for the pain and inflammation after 3 days of practise the pain went and I no longer needed to take the medication, mind over matter I hear you cry maybe, the postures certainly helped open up my back so there was not as much compression and it strengthened the area that needed it around the core of my waist, hips, legs and lower back. I then went on to study the 24 step form which again I have found to be beneficial in keeping the core muscles in good condition. It has taken a few years for me to emulate my teachers postures and get my stances low enough to feel more benefit from the style, but extreme stances are not stressed in Hunyuan and no stamping is done. The idea is to cultivate our inner strength by concentrating on the movements and how they correspond to the Dan Tian, in moving in circles. My teacher told me to keep the movements big and not be tempted to shorten them even when applying them as this would inhibit the flow of energy and slow development.
I have gone on to learn the 38 Pao Chui form and find this a great form to really relax and try to let the power flow. The Fa Jing aspect again is not stressed as the late GM said. If not done correctly you could injure yourself long term. Even if done after many years of training it should be done sparingly with more concentration on internal development than showing outward force.
I will be returning to the UK in 2014 and anyone wishing to learn the Hunyuan Taiji please get in touch.