This is an accurate tab of this song on the pipa
Tuning : A,D,E,A (the D is an octave lower)

    S  S  S  S   Q        Q         E       E
A|-----------12--9~~~~~~~(9)---------------------------|
E|--------7-------------------------7b8r7---5----------|
D|--0------------------------------0-------------------|
A|-----0--------------------------0--------------------|

    S  S  S  S  Q           S  S  S  S  Q
A|--------0-----------------------0--------------------|
E|-----7-----7-----------------7-----7-----------------|
D|--------------------------9-----------9--------------|
A|--7-----------7--------------------------------------|

There is another (easier) way to play it and I believe it is the way Mike Einziger 
(Incubus guitarist) plays it.
The tuning is different this time : D,A,D,A (Down tune the 4th string 3? steps lower, 
the 3rd one 2? steps lower and the 2nd one a step lower)

    S  S  S  S   Q       Q         E       E
A|-----------12--9~~~~~~(9)----------------------------|
D|--------9-------------------------9b10r9--7----------|
A|-----0---------------------------0-------------------|
D|--0-----------------------------0--------------------|


A|--------0--------------------0-----------------------|
D|-----9-----9--------------9-----9--------------------|
A|--7-----------7--------------------------------------|
D|-----------------------9-----------9-----------------|

Repeat this over and over, try to improvise something through it and have fun!