South Africa is hosting the BRICS summit this week.Zhang Yudong/Xinhua/Getty Images Over 40 countries are interested in joining Brazil, Russia, India, China, and South Africa in the BRICS bloc, Reuters reported. The bloc is seen as an alternative to Western-led blocs dominating the world order. However, the BRICS bloc faces challenges from rivalry between China and India, and Russia's war in Ukraine. The BRICS international summit in South Africa this week is drawing interest from countries that are sick and tired of the Western-led blocs.More than 40 countries have expressed interest in joining Brazil, Russia, India, China, and South Africa in the BRICS bloc as an alternative to Western-led international groupings, Reuters reported on Tuesday, citing South African officials.South Africa is hosting the 15th summit of the BRICS bloc in Johannesburg from Tuesday to Thursday.