2 sentences for 节约 (jié​yuē — frugal)

1. 他一向生活节约，从不乱花一分钱。

   tā yī​xiàng shēng​huó jié​yuē, cóng bù luàn huā yī fēn qián.

   He has always lived economically and never wastes a penny.

   Source: Dong Chinese Dictionary

2. 勤俭节约已经成为一种良好的社会风尚。

   qín​jiǎn jié​yuē yǐ​jīng chéng​wéi yī zhǒng liáng​hǎo de shè​huì fēng​shàng.

   Thrift and frugality have become a positive social trend.

   Source: Dong Chinese Dictionary