HSK 7–9 · noun · Practice
心血
painstaking effort; heart and blood
这本书是他多年的心血。
Zhè běn shū shì tā duō nián de xīnxuè。
This book is the fruit of many years of his painstaking effort.
这幅画凝聚了他多年的心血。
Zhè fú huà níngjùle tā duō nián de xīnxuè。
This painting embodies years of his hard work.