At the password selection screen enter the following password for stage select
Classic Shanghai
Stage 1 --- Stage 16 T56
Stage 2 D33 Stage 17 W89
Stage 3 G66 Stage 18 Z1C
Stage 4 J99 Stage 19 C4F
Stage 5 M2C Stage 20 F7I
Stage 6 P5F Stage 21 I0L
Stage 7 S8I Stage 22 L3O
Stage 8 V1L Stage 23 O6R
Stage 9 Y4O Stage 24 R9U
Stage 10 B7R Stage 25 U2X
Stage 11 E0U Stage 26 X5!
Stage 12 H3X Stage 27 A80
Stage 13 K6! Stage 28 D13
Stage 14 N90 Stage 29 G46
Stage 15 Q23 Stage 30 J79
The Great Wall
Stage 1 --- Stage 16 U67
Stage 2 E44 Stage 17 X9A
Stage 3 H77 Stage 18 A2D
Stage 4 K0A Stage 19 D5G
Stage 5 N3D Stage 20 G8J
Stage 6 Q6G Stage 21 J1M
Stage 7 T9J Stage 22 M4P
Stage 8 W2M Stage 23 P7S
Stage 9 Z5P Stage 24 S0V
Stage 10 C8S Stage 25 V3Y
Stage 11 F1V Stage 26 Y6?
Stage 12 I4Y Stage 27 B91
Stage 13 L7? Stage 28 E24
Stage 14 O01 Stage 29 H57
Stage 15 R34 Stage 30 K8A
Beijing
Stage 1 --- Stage 16 V78
Stage 2 F55 Stage 17 Y0B
Stage 3 I88 Stage 18 B3E
Stage 4 L1B Stage 19 E6H
Stage 5 O4E Stage 20 H9K
Stage 6 R7H Stage 21 K2N
Stage 7 U0K Stage 22 N5Q
Stage 8 X3N Stage 23 Q8T
Stage 9 A6Q Stage 24 T1W
Stage 10 D9T Stage 25 W4Z
Stage 11 G2W Stage 26 Z7.
Stage 12 J5Z Stage 27 C02
Stage 13 M8. Stage 28 F35
Stage 14 P12 Stage 29 I68
Stage 15 S45 Stage 30 L9B