from Sakhalin after the Ming assigned titles like weizhenfu (official charged with subjugation), zhihui qianshi (assistance commander), zhihui tongzhi (vice commander) and Zhihuishi (commander) from Sakhalin indigenous headmen. The Ming received tribute from the headmen Alingge, Tuolingha, Sanchiha and Zhaluha in 1437. The position of headman among Sakhalin indigenous peoples was inherited paternally from father to son and the sons came with their fathers to Wuliehe. Ming officials gave silk uniforms with the appropriate rank to the Sakhalin Ainu, Uilta and Nivkh after they gave tribute. The Maritime Province region had the Ming "system for subjugated peoples' implementers in it for the Sakhalin indigenous peoples. Sakhalin received iron tools from mainland Asia through this trade as Tungus groups joined in from 1456-1487. Local indigenous hierarchies had Ming Chinese given political offices integrated with them. The Ming system on Sakhalin was imitated by the Qing. Nivkh women in Sakhalin married Han Chinese Ming officials when the Ming took tribute from Sakhalin and the Amur river region. The Yongle Emperor instituted a Ming governor on Luzon during Zheng He's voyages and appointed Ko-ch'a-lao (許柴佬; Xu Chailao) to that position in 1405. China also had vassals among the leaders in the archipelago. China attained ascendancy in trade with the area in the Yongle Emperor's reign. The local rulers on Luzon were "confirmed" by the governor or "high officer" appointed by the Yongle Emperor. States in Luzon, Sulu (under King Paduka Pahala), Sumatra, and Brunei all established diplomatic relations with the Ming Empire and exchanged envoys and sent tribute to the Yongle Emperor. The Yongle Emperor exchanged ambassadors with Shahrukh Mirza, sending Chen Cheng to Samarkand and Herat, and Shahrukh sent Ghiyāth al-dīn Naqqāsh to Beijing. Death On 1 April 1424, the Yongle Emperor launched a large campaign into the Gobi Desert to chase an army of fleeing Oirats. Frustrated at his inability to catch up with his swift opponents, the Yongle Emperor fell into a deep depression and then into illness, possibly owing to a series of minor strokes. On 12 August 1424, the Yongle Emperor died. He was entombed in Changling (), a location northwest of Beijing. Legacy The Yongle Emperor is generally regarded to have had a lifelong pursuit of glory, power, and wealth. He respected and worked hard to preserve Chinese culture by designing monuments such as the Porcelain Tower of Nanjing, while patronizing Mongol and Tibetan cultures. He deeply