wǎnshàng xǐ yīfu bù yīdìng zǒng piányi, yào kàn dāngdì guīzé hé diànbiǎo lèixíng

晚上洗衣服不一定总便宜，要看当地规则和电表类型。

Doing laundry at night isn't always cheaper; it depends on local regulations and the type of electricity meter.