NEW DELHI, Aug. 22 (Xinhua) -- Indian Prime Minister Narendra Modi left for South Africa on Tuesday at the invitation of South African President Cyril Ramaphosa to participate in the BRICS Summit to be held in Johannesburg, announced the Ministry of External Affairs. During his visit, Modi will also take part in the BRICS-Africa Outreach and BRICS-Plus Dialogue events. "We value that BRICS has become a pl