What role did the Chinese explorations in Indian oceans play preserving culture?

There were no significant Chinese explorations or missions recorded of the Indian Oceans aimed at preserving or promoting any specific culture during ancient or historical times. China's primary engagements with the Indian Ocean in the past focused on trade, political diplomacy, cultural exchanges, and spreading their influence via tributary systems. China's maritime activities were generally restricted to regions closer to their shores with some prominent instances during the Ming Dynasty but those expeditions had minimal influence in terms of cultural aspects for people residing in the Indian Ocean regions like modern India.