
For Vietnam their reputation would suffer but because the west are looking for help from Vietnam, in regards to China’s threat, they’re probably not that worried about their reputation.What about his layover in Vietnam?
Vietnam (communist North) has had strong ties with the USSR (russia). Vietnam is worried that because of russia’s growing dependence on China, China could use this dependence to undermine Vietnamese interests in areas that are contested with China. This could also include stopping russian arms sales to Vietnam.
Vietnam has been neutral on russia's invasion of Ukraine.
Similar situation to russia and India.