in reference to the period between 1820 and 1850. Many officials stationed in Taiwan called for an active colonization policy over the 19th century. In 1788, Taiwan Prefect Yang Tingli supported the efforts of a settler named Wu Sha in his attempt to claim land held by the Kavalan people in modern Yilan County. In 1797, Wu Sha was able to recruit settlers with financial support from the local government but was unable to officially register the land. In the early 1800s, local officials convinced the emperor to officially incorporate the area by playing up the issue of piracy if the land was left alone. In 1814, some settlers attempted to colonize central Taiwan by fabricating rights to lease aboriginal land. They were evicted by government troops two years later. Local officials continued to advocate for the colonization of the area but were ignored. The Qing took on a more active colonization policy after 1874 when Japan invaded aboriginal territory in southern Taiwan and the Qing government was forced to pay an indemnity for them to leave. The administration of Taiwan was expanded with new prefectures, sub-prefectures, and counties. Mountain roads were constructed to make inner Taiwan more accessible. Restrictions on entering Taiwan were ended in 1875 and agencies for recruiting settlers were established on the mainland, but efforts to promote settlement ended soon after. In 1884, Keelung in northern Taiwan was occupied during the Sino-French War but the French forces failed to advance any further inland while their victory at Penghu in 1885 resulted in disease and retreat soon afterward as the war ended. Colonization efforts were renewed under Liu Mingchuan. In 1887, Taiwan's status was upgraded to a province. Taipei became a temporary capital and then the permanent capital in 1893. Liu's efforts to increase revenues on Taiwan's produce were hampered by foreign pressure not to increase levies. A land reform was implemented, increasing revenue which still fell short of expectation. Modern technologies such as electric lighting, a railway, telegraph lines, steamship service, and industrial machinery were introduced under Liu's governance, but several of these projects had mixed results. The telegraph line did not function at all times due to a difficult overland connection and the railway required an overhaul while servicing only small rolling stock with little freight load. A campaign to formally subjugate the aborigines was launched with 17,500 soldiers but ended with the loss of