Later it was renamed sos, which means shiu's sister Hua's sister. It was obtained by Wang Zhiping, a famous record producer in Taiwan Province Province.

After that, sos had a contract dispute with the economic company and changed the company. The old company didn't allow them to use the name sos, so the new company used asos to show the difference from the previous name.

Because they are sisters, the elder sister's name is Big S, and the younger sister's name is Small S, which is not their English name. The English name of Big S is barbie.