When beginners practice Taiji, they may feel that the training method of Taiji is similar to the previously mentioned methods. However, this is not the case. According to the theoretical requirements of Taiji, after a period of training, gradually combining theory with posture, it becomes very apparent that the previous training methods and requirements are different from those of Taiji. The requirements for practicing Taiji involve the unification of one's spirit, intent, and qi, merging together to form a kind of light, agile, and circular force (jin). This force is primarily based on the blending of qi and intent. Its essence is qi, and the requirements for it are to be empty, void, and dispersed, rather than concentrated. This is known as Taiji jin, also called innate jin.