going and coming

Try to calculate how many people will stay and away for Christmas and New Year. Qin: go to meet her ever-lasting lover Prague in late Dec; Xia: will come and see goodbye in late Dec; Xu, mingwei and xiehe couple: will come in Dec 23 and spend a week here; Liuchang: will go to Hawaii; Chen: will go to London for her study trip and then go back to China; Ximena: will go to Paris and Amsterdam (the real one, not Amsterdam Ave) ; poor me: stay at home Question: how to spend a new year without regret?