fā / xiàn / wèn / tí / hòu / tā / jí / shí / xuán / yá / lè / mǎ / tíng / zhǐ / le / zhè / xiàng / wēi / xiǎn / de / tóu / zī

发现问题后，他及时悬崖勒马，停止了这项危险的投资。

After discovering the problem, he stopped the dangerous investment in time.