If the government takes various interventions for some purpose, it is called " management float " or " dirty float " .
若政府出于某种目的，采取各种干预措施，则称为" 管理浮动" 或" 肮脏浮动" 。
英语百科
Managed float regime
（重定向自Dirty float）
Managed float regime is the current international financial environment in which exchange rates fluctuate from day to day, but central banks attempt to influence their countries' exchange rates by buying and selling currencies. It is also known as a dirty float.