Short answers, pulled from the story.
The South African Republic dissolved its existence as a sovereign state on the 31st of May 1902. The Treaty of Vereeniging dictated the fate of every Boer burgher in the region following this dissolution.
The Chamber of Mines introduced legislation to import Chinese workers on the 28th of December 1903 which took effect in February 1904. This law included extremely restrictive employment contracts and ended by 1910 on the Witwatersrand.
Louis Botha and Jan Smuts unified the Boer political movement into a new party called Het Volk in January 1905. This party sought reconciliation with Britain while pursuing Boer self-rule for the Transvaal.
Thirty delegates met in Durban under Sir Henry de Villiers on the 12th of October 1908 to discuss a constitution. Twelve delegates came from the Cape Colony while eight arrived from the Transvaal and five each represented the Orange River and Natal Colonies.
Population statistics from the 1904 Census showed Black residents numbered 937,127 or 73.79 percent of the total population. White residents totaled 297,277 representing 23.40 percent while Colored individuals counted 24,226 making up 1.90 percent.