The narcotics were being shipped via sea, where 80 percent of interdictions of U.S- bound drugs typically occur.
More sellers are entering the market, with active sales listings hitting the highest level since March 2020.
Trump invited Xi to visit the United States in September.
The Rubio case is the latest example of diplomatic adjustments as the United States and China seek to manage tensions through high-level talks.

The Justice Department seeks to nullify the D.C. Bar’s prosecution of former Assistant Attorney General Jeff Clark, who worked on alleged 2020 election fraud.
The company voluntarily recalled the noodles.
Victims, including minors, must be protected from people who produce nonconsensual intimate images or deepfakes for ‘depraved motives,’ the FTC chair said.
Stephen Cloobeck is accused of threatening victims of his influencer fiancée, who is suspected of stealing from men she met online.
Both chambers approved resolutions calling for the release of faith leaders and others currently imprisoned by Beijing.

A federal judge said the DOJ’s request was a ‘drastic overreach of its investigative authority.’
The 2nd District is known as the ‘Blue Dot’ because Omaha has historically leaned Democratic in a Republican state.
Public opposition and rising gas prices have intensified pressure on lawmakers.
The action is the latest in a series of steps to crack down on fraud in Medicare services considered a high risk for fraud.
The judge also determined that ICE’s training on conducting lawful warrantless arrests was inadequate.
Sen. Shelley Moore Capito’s primary win all but guarantees a general election victory in the nation’s second-most Republican state.
The OpenAI CEO added a personal dimension to competing narratives in the bitter feud between the two tech giants.
If the redistricting effort is ultimately successful, the primary would be delayed from June 9 to Aug. 11.
The U.S. Court of International Trade had ruled that the tariffs were not allowed under the Trade Act.
The department had estimated the war’s cost at $25 billion on April 29.
The state’s Second Congressional District is getting national attention over how Electoral College votes are parceled out.
The U.S. Treasury Department said the effort was a part of ‘Economic Fury,’ which has seen several previous targets sanctioned.