Chinese puzzle
noun [ C ] uk/ˌtʃaɪ ˈniːz ˈpʌz.əl/ us/ˌtʃaɪ ˈniːz ˈpʌz.əl/
中国智力玩具;（尤指）七巧板
a game where you have to solve the problem of fitting many different pieces together, especially boxes inside other boxes
复杂的情况;难解的问题
a situation that is complicated and difficult to understand