Zhu Lilan and the June 21 Letter to Thaw a Frozen Relationship

By Harlan Pryce · September 17, 2026

Kept under a withheld classification, a 1999 communication sought to bridge a divide opened by NATO's bombing of a Chinese embassy and the theft of nuclear secrets

The diplomatic cost of a single mistake is often measured in decades of distrust and the sudden silence of open channels. In May 1999, that cost was a demolished embassy in Belgrade and a bilateral relationship that collapsed into a state of total systemic failure.

This is the wreckage the record describes when it notes that the U.S. and NATO's "unintended bombing of the Chinese embassy in Belgrade in May" caused the "greatest dent in bilateral ties." The resulting frost did not just kill high-level summits; it reached down into the technical weeds of environmental policy, which the record reports was "temporarily froze" and dismissed by news reports as mere "window dressing."

The Low-Politics Survival Channel

While the missiles were falling in the Balkans, a smaller, quieter mechanism was attempting to keep the two superpowers from drifting into complete isolation. The U.S.-China Forum on Environment and Development was designed to facilitate technical cooperation on ecological issues, a form of "low-politics" designed to operate beneath the noise of geopolitical conflict.

According to the record, which survives here as an archival description of a letter rather than the original pages, Leon Fuerth—the National Security Adviser to Vice President Al Gore who later transitioned to a professorship of international affairs—sent a report on June 21, 1999, to Zhu Lilan. Zhu was China’s Minister of Science and Technology from 1998 to 2001, the man tasked with overseeing the PRC's technical leap into the new millennium.

Fuerth’s letter delivered the results of four sessions held on April 9, 1999. The record establishes that the attached summation contained a "fairly impressive list of steps taken to expand cooperation." On paper, the scientists and bureaucrats had found common ground. In reality, those gains were irrelevant. The record is blunt: these accomplishments were "overshadowed by political fractiousness in the U.S. over China."

Document imagery from nsarchive.gwu.edu From the files: nsarchive.gwu.edu

The Pincer Movement

The frost that froze the environmental track was not just the result of the Belgrade bombing, but a domestic pincer movement in Washington. The public record establishes that the Clinton administration was caught between two opposing forces. On one side, political pressure from the left pushed the U.S. to sponsor a U.N. resolution condemning Beijing’s human rights record. On the other, the right attacked the PRC for systemic espionage, specifically the theft of military and nuclear secrets.

This domestic volatility had a direct impact on the PRC's primary strategic goal: admission to the World Trade Organization, the intergovernmental body that regulates global trade. The record shows that this general anti-China sentiment led Clinton to "back away temporarily" from supporting the PRC's entry into the WTO.

The connection here is the leverage of the WTO. For the PRC, the WTO was the ticket to global economic legitimacy; for the U.S., it was the only leash long enough to pull Beijing toward Western norms. When the bombing in Belgrade happened, that leash snapped. The environmental forum, then, ceased to be a tool for progress and became a survival channel—the only line still open when the high-politics of trade and security had reached a state of total failure.

The June 21 Ping Sequence

If we look at the chronology of June 1999, the pattern suggests a coordinated "ping" sequence. The desk's reading is that the Fuerth letter to Minister Zhu Lilan on June 21 was not merely a delivery of old reports from April, but a technical probe sent to test the PRC's receptivity.

Exactly twenty-four hours later, on June 22, Vice President Al Gore sent a letter to the Chinese Prime Minister, Zhu Rongji. This sequence—a technical report to a minister followed immediately by a high-level outreach to a head of government—indicates a calculated effort to restart the engine of diplomacy. By using the "low-politics" of environment and science as the initial contact point, the U.S. was attempting to find a gap in the PRC's anger over the embassy bombing.

Furthermore, the choice of recipient is telling. Zhu Lilan was not a diplomat; he was the Minister of Science and Technology. The desk's reading is that the "Science and Technology" beat provided a convenient diplomatic cover for negotiating the boundaries of dual-use technology transfers. This allowed both sides to discuss the very issues—nuclear secrets and military espionage—that were fueling the fire in Washington, but to do so under the guise of environmental cooperation.

The Shape of the Gap

There is a glaring disparity between the "impressive list" of cooperation and the "frozen" state of the relationship. The record provides the summary, but it does not provide the specific "asks" or concessions that followed the Belgrade disaster.

If the shape of this file is what it appears to be, the withheld portions of the record—those pages still missing or classified—likely contain the price the U.S. offered to pay to mitigate the Belgrade fallout. A summary of "steps taken" in April cannot thaw a relationship frozen by an embassy bombing in May. The real diplomacy happened in the gaps of the record, in the specifics of what the U.S. was willing to concede to keep the PRC from walking away from the WTO table entirely.

This theory is supported by the trajectory of the following month. The public record shows that by July 1999, an EPA technical team had successfully visited China. The Environmental Protection Agency, the arm of government tasked with domestic regulation, became the proxy for bilateral stability. When the State Department and the Pentagon were toxic, the scientists were the only ones allowed in the room.

The desk's reading is that the environmental track was not "window dressing," as the news reports of the time claimed, but the only functional corridor remaining. It was the sole pressure valve available to prevent a total rupture in the Pacific. The pattern reveals a government that, when faced with a catastrophic military error, retreats into the most boring possible subject—environmental technicalities—to hide the desperate work of damage control.

What a full release of these files would show is the exact transactional nature of that thaw. It would show that the "impressive list" of environmental cooperation was the currency used to buy silence over the Belgrade bombing and to keep the WTO process alive. The people who paid for this stability were the victims of the Belgrade blast, whose deaths were managed as diplomatic variables in a technical exchange. The record shows us the letters, but the silence in the archive shows us the price.

Zhu Lilan and the June 21 Letter to Thaw a Frozen Relationship

The Low-Politics Survival Channel

The Pincer Movement

The June 21 Ping Sequence

The Shape of the Gap

Sources