the phonological system of hainanese corresponds well with that of hokkien, but it has had some restructuring. in particular, etymological *anterior plain stops have undergone implosivization (*p > , *t > , etymological *aspirated stops have spirantized (*pʰ > , *tʰ > , *cʰ > *kʰ > ), and etymological *s have hardened into stops (*s > ), and *h > . additionally, some dialects have , and is allophonic with .