Put spring onions and cabbage in the jar until it filled up. Add water that you soak your rice on into the jar until water covered your veggies. Then pour that water out onto a bowl or jug, then weigh the net weigh of the water. Then you need to add up weight of your veggies (600g) and water(300) together and times.25 and you will have the result of amount of salt you need to add in the water (900 x 0.25 = 225 so I will add 2.5g) Add 2.5 g of salt in the water and mix well.