While there are at least five versions of Chen Taiji,
three are the most widely established.

The most enduring versions
are attributed to Chen Chanxing (Yang Lu Chan’s Taiji teacher)
and Chen Fake (Фа-Ке, ударение на посл. слог - А.Н.),
the famed Chen family grandmaster
from the middle of the last century –
known today as the Lao Jia or “Old Frame”,
which exhibits the long, flowing technique characteristic
of Northern Chinese boxing
and Xin Jia or “New Frame”
which exhibits an overt display
of the crucial, chan szu jing or “silk reeling” energy unique to Chen Taiji.
The third, Xiao Jia or “Small Frame” style,
is an early version
that features more compact movements
and is gaining in popularity.
Regardless of style, each version of Chen Taiji
adheres to the original concepts
of chan szu jin and “dantien” (lower abdominal) control.
As such, all three versions of Chen Taiji
exhibit the style’s unique and health-giving, twining/coiling movement
and execution of power-issuing or “fa jing”,
with sophisticated fighting techniques
anchored to structurally sound, powerfully rooted stances.

Taken from
http://truetaichi.com/passage

Ссылка на сайт truetaichi.com дана на оф. сайте Чень Сяована.