Chang Shih-chiao observes that it is only in the last few years that the Feitsui Reservoir has really come into use; before that, in fact the investment was wasted.
只顧著開水庫，讓水庫的利用也缺乏效率，張石角就指出，翡翠水庫直到近幾年才真正發揮功能，之前的投資其實是浪費。