Shift register and driving method thereof, gate driving circuit and display apparatus

A shift register, comprising:

• a forward scanning input sub-circuit for pre-charging a potential of a pull-up node by an operation level signal under control of a forward input signal and a forward scanning signal during forward scanning;
• a backward scanning input sub-circuit for pre-charging the potential of the pull-up node by an operation level signal under control of a backward input signal and a backward scanning signal during backwards scanning;
• an output sub-circuit for outputting a clock signal through a signal output terminal under control of the potential of the pull-up node;
• wherein the pull-up node is a connection node of the forward scanning input sub-circuit, the backward scanning input sub-circuit and the output sub-circuit,
• said shift register further comprising:
• a forward scanning reset sub-circuit for resetting the pull-up node by a non-operation level signal under control of a forward reset signal and the forward scanning signal during forwards scanning,
• said forward scanning input sub-circuit and said forward scanning reset sub-circuit operate independently each other.