Fifty years later, Xi and Putin show public unity by attending each other’s military parades, giving each other medals, and sitting through many long Shanghai Cooperation Organization summits.

Beyond the hype, so far there is little sign of the intense cooperation that exists between the U.S. and its military allies in Europe and Japan. Russia sells China weapons—more than $10 billion since 2011—mostly because it needs the hard currency. They are now jointly developing drones.

Both countries are also (separately) modernizing their militaries. China wants to be able to deny access to American ships in the region, and train its forces to operate beyond China’s borders. The Chinese military has little experience abroad, as the young Chinese soldier hinted when he said this week’s exercise was his first large overseas deployment. The Russian and Chinese navies increasingly do small exercises together as they both try to deter U.S. influence in Asia.

Importantly, there is so far no formal security pact—nothing akin to NATO in Europe—that requires China and Russia to defend each other and that could embed this relationship in a mutually beneficial package.

Economic relations follow the same pattern: historic distrust, much more hype than realism about their current partnership, but a gentle trend towards more cooperation. For example, a much-celebrated 2015 deal enabling China to buy Russian natural gas now seems anemic, slowed by disputes over pricing, pipeline routes, and Chinese resentment over Russia’s negotiation tactics. Trade between the two increased 20 percent last year (to $84 billion) but is still dwarfed by China’s trade with the U.S. ($635 billion in 2017). This July, China Development Bank loaned a Russian state-owned bank over $9 billion to build infrastructure connections between the two countries. It’s an eye-popping number, but astute observers think much of it won’t materialize.

China’s jaw-dropping family separation policy

Chinese businessmen have told me they are hesitant to invest in Russia because it’s “riskier than Congo” and “unpredictable.” Despite some aligned economic interests, many Russians don’t like the Chinese market much. The distrust is mutual. A history of border conflicts and soured business deals has made economic relations rocky. Although the two countries’ governments sometimes resent the United States, they often differ on major geopolitical issues. Xi’s Belt and Road Initiative (and its militarization of the trade routes) has reduced Russia’s influence in Central Asia. China bristles at Russia’s annexation of Crimea, its military aid to regional rivals such as India and Vietnam, and its support for the Afghan Taliban.

Where does all this lead? China has traditionally eschewed formal alliances, and Xi reaffirmed that policy this April. So far, there is no China-Russia “bloc” to worry about. But make no mistake: The Trump administration’s tough line on trade and the way some U.S. politicians and members of the press seem to treat China as the new enemy is dangerously close to becoming a self-fulfilling prophesy.