Buuxi weedhan soo socota: Bishii Juun 1975, Ra'iisul Wasaaraha Sri Lanka Sirimavo Bandaranaike ayaa booqday Mexico City si uu uga qayb galo shirkii ugu horeeyay ee caalamiga ahaa
Shirka Haweenka Adduunka. Bil ka dib, bishii July 1975, Madaxweynaha Mexico Luis Echeverría ayaa booqasho rasmi ah ku yimid Sri Lanka. Intii lagu guda jiray booqashadiisa, Madaxweyne Echeverría wuxuu la kulmay Ra'iisul Wasaaraha Sri Lanka Sirimavo Bandaranaike waxayna ka wada hadleen arrimaha laba geesoodka ah iyo arrimaha caalamiga ah ee wadaagga ah. Labada hoggaamiye waxay ka wada hadleen fursad ay ku sii wadi lahaayeen wada hadalka bilowday intii uu socday booqashadii rasmiga ahayd ee Ra'iisul Wasaaraha uu ku tagay Mexico bishii Juun 1975. Waxay ku qanacsan yihiin xiriirka sii kordhaya ee u dhexeeya Mexico iyo Sri Lanka waxayna ku heshiiyeen inay sii xoojiyaan, gaar ahaan dhinacyada ganacsiga, dhaqanka, sayniska iyo tikniyoolajiyadda. Bishii Agoosto 1976, Wasiirka Arrimaha Dibadda ee Mexico Alfonso García Robles wuxuu booqday Sri Lanka si uu uga qayb galo shirkii Dhaqdhaqaaqa aan la socon ee Colombo.