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In OTL, on a visit to China in 1958, Kshev proposed to Mao that the Soviets build a Long-Wave radio facility in Hainan island for global communications with submarines and that the PRC and USSR operate a joint fleet of submarines off the PRC coast.

Mao flipped out at the suggestion, and this was a piece of the deterioration of Sino-Soviet relations as the decade turned.

Despite interpretations of neocolonial nefariousness, Kshev's proposal was pretty much a reasonable suggestion to increase Soviet naval effectiveness against the US which had a much, much better supporting infrastructure along the open oceans.

What if Kshev shortly after this proposed at least building the communications facially in North Vietnam in 1958. For the Soviet Navy, North Vietnam's geographical position would have been fairly similar to Hainan island, allowing better coverage of the South Pacific and Indian Oceans.

How pissed would Mao have been at the North Vietnamese if they accepted this facility. Would it have altered or lessened the support China was in OTL willing to provide to North Vietnam in its operations in Laos and against North Vietnam in the 1960s?

Might the North Vietnamese have refused, possibly checking in with Beijing and finding them dissatisfied?

IF they did that, would the USSR have been permanently offended by North Vietnam, and disinclined to support their war effort later?
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