In a small bowl add the chilli bean sauce and the fermented yellow beans.
Heat a wok over high heat and add the peanut oil. Add the garlic then the chilli. Then add the stalks of the water spinach and give it a good stir. Add a small splash of water around the edges of the wok. Then add the leaves of the water spinach and stir fry it for 1 minute until it starts to turn a deeper green.
Make a well in the centre of the woks pour in the chilli bean and yellow bean sauce. Toss and stir together. Cook for less than 1 minute and then transfer to a plate and serve with rice and your favourite dishes.