護法運動
On 13 February 1912, Sun Yat-Sen resigned his position as provisional President of the Republic of China and conducted an inspection tour of China to invigorate its development, visiting Macau in May 1912 and June 1913. In May 1919, Sun Yat-Sen expelled the warlord Gui Xi (Guizhou military clique) in Guangdong and assigned his son Sun Ke to set up an office at the Rua de Inacio Baptista No. 10 to plan and agitate on behalf of the Constitutional Protection Movement. In 1922, Sun Yat-Sen supported the anti-tyranny wishes of the Chinese people of Macau and received a petition delegation from Macau workers in Guangzhou to make every effort to defend the Macau populace.