初伏

the first of the three annual periods of hot weather (三伏[san1 fu2]), which typically begins in mid-July and lasts 10 days

at first / (at the) beginning / first / junior / basic

surname Fu

to lean over / to fall (go down) / to hide (in ambush) / to conceal oneself / to lie low / hottest days of summer / to submit / to concede defeat / to overcome / to subdue / volt