Heat the water in the kettle to boil. Add this water into a deep pot with the rice and turn heat to boil. Then lower to medium-high heat, cover partially, and cook for 25 minutes. Do not stir too much.
Cut chicken breast into slices. Marinate with cornstarch, oyster sauce, 2 tablespoons water, and 2 tablespoons oil in a medium bowl. Keep aside.
After cooking rice for 25 minutes, whisk it for 3 minutes while on medium-high heat.
Add napa cabbage and cook for 1 minute.
With a pair of chopsticks, add marinated chicken a little at a time. Cook for 1 minute, adding salt and white pepper.
Add ginger and stir for 30 seconds.
Lastly, add the sesame oil and green onion.
