When I wrote the page today, I encountered a problem: the outer layer is a volist, and then a volist drop-down box option is nested inside. But after I found that the volist inside was written, the key values of the outer layer all became 1.
Later, nesting foreach with volist is still useless. Only by using double-layer foreach and setting the key value, the outer key will not be disturbed by the key of the inner loop.
