Bishii Juun 1975, Ra'iisul Wasaaraha Sri Lanka Sirimavo Bandaranaike ayaa booqasho ku tagtay Magaalada Mexico si uu uga qayb galo Shirweynihii ugu horeeyay ee Caalamiga ah ee Haweenka
Waxaad Bil ka dib, bishii July 1975, Madaxweynaha Mexico Luis Echeverría ayaa booqasho rasmi ah ku yimid Sri Lanka. Intii lagu guda jiray booqashada, 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 danaha guud. 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.