Well, it looks like the J-20 stealth fighter we showed you yesterday is indeed China's second stealth jet.
The pic above shows a new serial number ending in 02 for the plane, identifying it as the second J-20. The first -- unveiled in late 2010 -- has the serial number of 2001 written on the nose (shown below).
No one outside of China is certain just what these planes are designed to do. Given their size, one could infer that they are either high-speed interceptors -- like the MiG-25 -- or they are long-range fast strike jets like the F-111.
Here's J-20 2001:
Here's J-20 2002:
Via China Defense Blog.