3 sentences for 高峰期 (gāo​fēng​qī — peak period)

1. 夏季是用电的高峰期。

   xià​jì shì yòng diàn de gāo​fēng​qī.

   Summer is the peak period for electricity consumption.

   Source: Dong Chinese Dictionary

2. 夏季用电高峰期，大家要注意节电。

   xià​jì yòng diàn gāo​fēng​qī, dà​jiā yào zhù​yì jié​diàn.

   During the peak electricity usage period in summer, everyone should be mindful of saving power.

   Source: Dong Chinese Dictionary

3. 国庆节假期是各大旅游景区人流量最大的高峰期。

   Guó​qìng​jié jià​qī shì gè dà lǚ​yóu jǐng​qū rén​liú​liàng zuì dà de gāo​fēng​qī.

   The National Day holiday is the peak period for visitor traffic at major tourist attractions.

   Source: Dong Chinese Dictionary