UA3CH 1958 European Russia

I guess this is a super-super rare QSL card.

Operator was Rem Gaukhman (he should have German relatives in his ancestry tree) in Moscow and he confirmed the FIRST-EVER QSO between Moscow and Peking.
Rem wrote on the back:
'First radio connection between HAM operators of Moscow and Beijing. Guys, I congratulate you to the start of the shortwave cummunication in the Peoples Republic of China'
Signed as:
'Master of sports Rem Gaukhman - member of the liberation war of China from the Japanese imperialists.'

QSL courtesy of BD1AYL
Info courtesy of DL9WVM