Answer:
It was the imperial palace of China for 492 years (1420–1912). It covers 0.72 sq km (0.28 sq mi), of which 15 hectares (38 acres) are floor area. It has 980 buildings in over 70 palace compounds, with over 8,700 rooms.
Explanation:
The Open Door Policy is a term in foreign affairs initially used to refer to the United States policy established in the late 19th century and the early 20th century, as enunciated in Secretary of State John Hay's Open Door Note, dated September 6, 1899 and dispatched to the major European powers.
The Adamson Act was the progressive reform that mandated an 8 hour workday for railroad workers since these workers prior to such reforms often were up against very harsh conditions and long hours.
