Mix corn or potato flour / starch with 1/4 cup of room temperature water in a mug or bowl until all smooth.
Into the same mug or bowl, add soya sauce, shaoxing wine, sesame oil, oyster sauce & white pepper. Mix well.
Place the pot used for your garlic chips, with the oil in it, back over the cooker and add your sauce mixture you just prepared in the mug or bowl.
Turn the heat on low, and stir continuously.
After a few minutes, you should see some small bubbles starting to form at the top and your sauce will start to thicken.
If you don't stir continuously, you risk getting starchy clumps and noone wants that.As a few larger bubbles start to form, your sauce will likely be to the right consistency. You decide! When ready, turn off the heat. If your saucepan is large enough, you make want to mix back in all the cooked kailan before plating onto your serving dish. Otherwise, you can also just place your kailan on your serving dish and pour the sauce over. Top with the garlic chips your prepared earlier. Serve with rice, or as one of the dishes for a family style meal!