Bal b/f TW$18+TW$3=TW$21 Bal c/f
省到水電：Bal b/f TW$5,110+TW$365=TW$5,475 Bal c/f
https://www.tkww.hk/a/202501/08/AP677e4fe2e4b0f8a56f82996a.html
https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://news.mingpao.com/ins/%25E7%2586%25
http://news.cnnb.com.cn/system/2025/01/08/030641219.shtml