Which countries participated in the Shanghai World Expo have established diplomatic relations with the Republic of China?

According to the data of the Ministry of Foreign Affairs of the Republic of China in 2006, the Republic of China currently has diplomatic relations with 26 countries:

There are 1 European countries: Vatican.

There are six countries in Oceania: Tuvalu, Nauru, Solomon Islands, Marshall Islands, Palau and Kiribati.

There are seven African countries: Malawi, Swaziland, Burkina Faso, Gambia, Senegal, Sao Tome and Principe and Chad.

There are 12 countries in Latin America and the Caribbean: Costa Rica, Dominica, El Salvador, Guatemala, Honduras, Panama, Haiti, Paraguay, Saint Vincent and the Grenadines, Saint Kitts and Nevis, Belize and Nicaragua.

Among the above countries, 23 countries participated in the Shanghai World Expo, and only 3 countries did not:

There are six countries in Oceania: Tuvalu, Nauru, Solomon Islands, Marshall Islands, Palau and Kiribati.

There are five African countries: Malawi, Burkina Faso, Gambia, Senegal and Chad.

There are 12 countries in Latin America and the Caribbean: Costa Rica, Dominica, El Salvador, Guatemala, Honduras, Panama, Haiti, Paraguay, Saint Vincent and the Grenadines, Saint Kitts and Nevis, Belize and Nicaragua.