Not putting down roots "Advance to attack; retreat to preserve" is the policy of the new emigrants. There are also emigrants who don't originally plan on coming back, but "beat a retreat" after they experience the poorly performing Western economies.
「進可攻、退可守」正是新移民的策略。也有移民原先並不打算走回頭路，但眼見西方國家景氣不振，還是只能班師回朝。