3#三思 / y2 l# Z+ k# H% \) I ; c6 G+ j$ O: K2 q7 X " N9 E K8 V$ c# k& l" B" W* PI will use the fourth tune with a slow glide downwards instead of the first tune, you can double check it from a native speaker or English dict for the [i:], it is not in a flat tune.