Soy sauce chicken

Name: Soy sauce chicken
Ingredients: 1kg skin-on and bone-in chicken thighs (6-7 thighs); 1 tbsp rapeseed oil; 4 spring onions 3 cut in half, 1 finely sliced on an angle, to serve; thumb-sized piece of ginger grated; 3 star anise; 2 bay leaves; 240ml light soy sauce; 2 tbsp dark soy sauce; 1 tbsp oyster sauce; 2 tbsp Shaoxing rice wine or Chinese rose wine (or use sherry); 3 tbsp dark brown sugar; 1 tbsp cornflour mixed with 1 tbsp water; cooked jasmine rice and steamed greens (we used broccoli and pak choi), to serve