逆水

against the current / upstream

contrary / opposite / backwards / to go against / to oppose / to betray / to rebel

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes

like rowing a boat upstream, if you stop moving forward you fall back (idiom)

lit. navigating a boat against the current (idiom) / fig. in a tough environment (one needs to work hard)

study is like rowing upstream – if you don't keep pushing forward, you fall behind