The scorching sun, crowded in the single nest in China's first-tier cities, fidgety; staring at the old air conditioner on the dirty and broken wall, he did not dare to turn it on due to high monthly electricity bills and excessive power. Wearing a big vest, he was kissed enough by mosquitoes. Wu seven eight black, mosquito harassment, let me sleep for a long time. For this reason, I got up in the middle of the night to hold my notebook and made a convenient treasure design. Although it is not perfect, it makes my heart feel more cool.