President Trump says he wants Xi Jinping, China’s leader, to call him to talk tariffs. Mr. Xi is ghosting Mr. Trump, and markets are plummeting.

Here’s a quick guide to the Trump administration’s talks with a number of different countries about tariffs and trade, as markets prepare for another week of headlines and signs of potential agreements.

Last week, a pack of rice crackers at Sun Vin Grocery store on Mulberry Street in New York City’s Chinatown cost $4.99. But this week, after President Donald Trump’s tariffs on items imported from China took effect,