The expeditions developed into a maritime trade enterprise in which the Chinese themselves began trading and supplying the commodities that were non-Chinese in origin and earlier entirely in the hands of the Indians, Arabs, and other foreigners. This highlighted the commercial character of the voyages, in which the Chinese further expanded upon the already large profits from their trade. The impact of the expeditions on commerce was on multiple levels: it established imperial control over local private commercial networks, expanded tributary relations and thereby brought commerce under state supervision, established court-supervised transactions at foreign ports and thereby generate substantial revenue for both parties, and increased production and circulation of commodities across the region. The voyages induced a sudden supply shock in the Eurasian market, where the Chinese maritime exploits in Asia led to disruptions of European imports with sudden price spikes in the early 15th century. Imperial proclamations were issued to foreign kings, meaning that they could either submit and be bestowed with rewards or refuse and be pacified under the threat of an overwhelming military force. Foreign kings had to reaffirm their recognition of the Chinese emperor's superior status by presenting tribute. Those rulers who submitted received political protection and material rewards. Many countries were enrolled as tributaries. The treasure fleet conducted the transport of the many foreign envoys to China and back, but some envoys traveled independently. During the onset of their voyages, the treasure fleet would embark from the Longjiang shipyard, north-west of Nanjing. They would then sail down the Yangtze River to Liujiagang. Once there, Admiral Zheng He would organize his fleet and make sacrifices to the goddess Tianfei. Over the course of the following four to eight weeks, the fleet would gradually proceed to Taiping anchorage in Changle, Fujian. There, the fleet would wait for the favorable northeast monsoon of winter before leaving the Fujian coast. They would reach the sea through the Wuhumen. They then mostly sailed through established trade routes to other regions. The port of Qui Nhon in Champa was always the first foreign destination that the fleet visited. During the first three voyages from 1405 to 1411, the fleet followed the same basic maritime route: from Fujian to the first call in Champa, across the South China Sea to Java and Sumatra, up the Strait of Malacca to northern Sumatra for assembly of the fleet, across the Indian Ocean to Ceylon, then along the Malabar Coast to Calicut. For the time being, the fleet sailed up to and no further than Calicut.