Even though Z is the one going off to college this fall, W is also going through transitions. Apart from his brother leaving, one of his best friends will also be leaving this summer, returning back to his home country for good.
They hang out constantly with each other, trying to enjoy their last few days together in Beijing, before we head back to the USA next week. They try to make plans to visit each other, sometime, somewhere, soon.
I repeat: it is heartbreaking for me to see my boys go through the pain of these separations. I hope it will make them more resilient.