Rinse asparagus, cut the stem ends and
smooth the surface. Scald. Cut bacon in half length wise. Wind the bacon
around the asparagus starting from 2cm below the asparagus tip. Fix it
with toothpick. Sprinkle with cornflour. Heat a little of oil in wok,
fry it. Dip the tip of the asparagus into some ketchup. Serve immediately.