No we just stop Chinese flagged vessel and tankers..and if you want see Malacca being closed for Chinese vessels ..all you have to do is attack Indian vessels in SCS.
Every vessel passing through Malacca and then Singapore straits has to pass in between Adman and Niccobar Islands with in few hundred miles of port blair, Indian tri service command and Sukhoi airbases in A&N islands.
India's Andaman and Nicobar Islands have the strategic position very good . It can completely control the routes into the Malacca strait