"Tell me how to open meridian?" and "Why did Wu change Yangs Style"?

Develop Internal Energy and open your meridian.

Mr. Hwa, could you tell me how to open my meridian?  "Learn the internal discipline of Classical Tai Chi. When you practice Tai Chi this way, you will develop internal energy circulating in your body which will open your meridian.  I encourage students to look at my YouTube channel found in the hyperlink above"

A student some time ago asked me via email: "How does the second generation of Wu's family change the posture from the original upright posture of Yang's Tai Chi to a straight lean?"  Perhaps one answer is to ask why ask this question before you practice instead of practicing and finding the answer for yourself? 

I have expanded on my original response to this individual for a more detailed answer.

The modern-day Tai Chi Classics do refer to "not leaning" when doing the Tai Chi, but who knows what those words were before the work was "interpreted" by various authors. I did Yang Tai Chi before Wu, I never cared for the way it made my back feel. Also, "Leaning" to me is leaning as in "he was leaning on me". I think of the postures as "tilted" but one does not say he was "tilting on me". The Classics also refer to postures as being "straight" and the misconception is that a "tilted" posture is not straight. Note you do not even see the word perpendicular in the Classics. However, "straight" could also be a flagpole planted in the ground at a 45-degree angle could it not?

Regarding any questions about why "the second generation "changed" from upright to lean: I can only repeat what I am told to my limited understanding and ask you a couple questions: Don't you think Yang Family would have plenty of opportunities and objected strenuously since Wu's later did many push hands with them? How could it be changed when it was already in a state where it was far ahead in its progress? My teacher tells me Wu Chien Chuan told Young Wabu "it cannot be changed". I see he did not say it was changed or it was not changed... he said: "it cannot be changed". Over time, I eventually began to understand this when I realized not only the learning is multi-generational but the eventual consequences...the "benefits" as well..."time" invested is the ultimate and deciding factor to all understanding. In other words, since "time" is the catalyst, asking such questions early on in one's study leads inevitably to a bitter taste as one will not like any answer that is given, asking when one is experienced will always leave a good taste in one's mouth.