Article says Chinese apple juice concentrate went from 3,000 metric tons to 40,000 metric tons in three years (twelve years ago), or in other words... from an insubstantial amount to a substantial amount. Price fell by 50% during that time, which economists refer to as "economies of scale". US producers that cut their prices to remain competitive complain that the new price is below THEIR cost of production, of course they have no idea of the Chinese cost of production, but we can assume the Chinese cost of production is low enough to still profit at the new price.
US Apple Juice produces think that a 91 percent import duty would be a fair solution. Very fair of them not to ask for something outrageous like 100%, don't you think?
Protectionists will always fight to protect the status quo.