Ou Ji,
I remember that thread. There was also another thread quite some time ago, maybe even last year. Anyhow I intended to ask about specific exercises back then but never did. Peeps were making claims of feeling qi and such after 2 weeks of practice. I’m very skeptical of that.
I would be very skeptical of most Qi claims! Thats why its always best to test for yourself but indeed one needs some quality time invested to see if something is of value or not.
Also the whole imagery thing seems to me could be all in the mind and if you want to feel it and imagine it flowing around you will believe that you feel it. I’m not looking for make believe.
Its always best to let things happen naturally! Avoid thinking or forcing your body to feel stuff. 3 keys! Posture, relaxation and soft dan tien breathing.
I’ve been practicing TC for about 8 years I guess but it’s always been secondary to kung fu training. I’m surprised it hasn’t come in this amount of time so I’m stumped.
Dont feel bad! 1 out of 10,000 taiji people probally get it! If that! Why? Is it so complicated or are we making things more complicated? They skip the core foundation training IMO. All Taiji start and end in Wuji! Zhan Zhuang is the base training of almost all internal martial art. Skip this and it may take a lifetime if you ever get it.
Like I said in another thread I’ve felt it personally from a TC master in China and it was real so I have no choice but to believe. But I still think that the majority who make qi claims are deluded.
That should tell you something is wrong with the training right! 
I’ve done standing type breathing exercises before but usually no more than 10 - 15 minutes. I’ll try pushing it to 20 - 30 minutes and see what happens although trying that for at least a year is a tough expirement.
I have been standing for 3+ years now. 10-15 minutes here and there wont do it! Minimum is 20 minutes a day for as long as it takes. Less just wont do it IMO. I have shared the Zhan Zhuang training with a few people. Some from Taiji and some from other arts. After 1 year of 20 minutes daily they are all starting to cultivate and their bodies are also changing! There is no magic pill to Chi! Standing is the simple way that cannot be exhuasted!
Oh and FT, how to shut up in the head is a question the desperately needs to be answered. My wife is continually amazed that my mind never stops thinking and I’m amazed that hers rarely starts thinking.
There is no empty mind for me.
Begin your training in Stillness (zhan zhuang) and be faithful to it! Little by little you will change/cultivate!
A good book to check out is:
Warriors of Stillness vol 1!
Taiji Wu Ji Zhuang!
Best of luck!