The curious fact is that, although the Austronesians carried out of Asia many cultural features of possible origin in central and southern China, such as making bark cloth, tattooing, certain decorative patterns, pottery making, adze styles, domestic pig, dog and chicken, house and granary designs and many useful plants, there is no trace of Chinese boat technology in Austronesian boats, or vice-versa. Similarly, there is little trace of the Pacific boats among the relatives of the Austronesians in Mainland Southeast Asia. This supports the idea that those details of the boat designs that are characteristic of the Austronesians were adopted in the islands at or after the time that they left Mainland Asia. After all, the combination of outrigger and Oceanic triangular sail is not suitable for lakes or rivers. The peculiarities of the single-outrigger canoes of Melanesia, Micronesia and Polynesia very likely had their origin in pre-Austronesian times in what are now Indonesia and the Philippines