His personal feeling to China and US is also real.

However, his return to Qinghua is clearly politically savy. And he is looking for more power and recognition from media, leaders, billions of people.

There's nothing wrong with that, unless you claim that you are doing it for pure beliefs like motherland or science. If he is sincere he should admit that it is for personal gain.

I have no complaint for those return to become rich, I do despise who made billion but claimed that they do this for motherland or "belief".