https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.youtube.com/watch%3Fv%3D20_ba5
https://youtu.be/Uz7eFm_U1I4?si=Dnle1sFiZjyJ3BWH
https://youtu.be/j5vsrK53Fp8?si=ej2P6AEiD6G9j4UU
https://youtu.be/2EYzUl7WddM?si=3dScKfBlwVpCxntM
省到水電：Bal b/f TW$28,105+TW$365=TW$28,470 Bal c/f