However, there is still room for growth in some areas, such as attracting more Chinese tourists and tapping the full potential of the free trade agreement between the two countries, he said.
When looking back after six years of diplomatic relations, Castillo said "it has been a very positive association in every way."
"In the first place, because it is a very cordial friendly relationship, of good will, where the two countries have been finding points of common interest," he said.
"For Costa Rica, the cooperation with China has been very rewarding," he said.
Despite the differences in their political systems and occasionally in the way they do things, the good will between China and Costa Rica has allowed them to jointly overcome obstacles that have arisen in their cooperation projects, said Castillo.
With the two countries' bilateral relations developing in a healthy way, China's presence in Costa Rica has awakened the interest of other Central American countries, which have expressed their intention to draw closer to the Asian powerhouse, the minister said.
It could be "comforting" for China to know that it can count on Costa Rica to facilitate its approximation to Latin America, he said.
"The other countries have observed that the relationship with China is positive and something similar is taking place in the rest of the continent," the minister said, adding "several countries in Latin America have very important economic ties with China."
Learning to be a perfect lady proves fruitful