Of course there is NO diplomatic solution for the problems in SCS(east VN sea) when VN want to take ALL islands . Its just like there were NO diplomatic solution for VN war against France and US and the only choice for France and US is to surrender and withdraw from VN.
CN army is just a joke, they can't fight in the real battle, they willing to surrender before firing a single shoot like when they surrender in 1979 battle. Its explain why small country like Japan could invade big CN and occupied Nanjing easily cos CN soldiers is just good at surrender.
104 Chinese soldiers surrendering at the Cao Bang town,
without firing a single bullet