I also visited the Northwest Institute of Nuclear Technology (NINT), which designed and produced diagnostic equipment to monitor nuclear weapon tests, assembled the instrumentation trailers used in each test, and conducted radiochemical analysis after the test to determine the yield of the explosion. I also traveled to Malan in northwest China, where their nuclear weapon tests were conducted. China's nuclear weapons test site is seven times bigger than the Nevada Test Site and was manned by 2,000 Chinese military and 8,000 civilian personnel. The Chinese provided me with a tour of several vertical hole test sites and I was able to walk into a tunnel that they had previously used for a horizontal test. I was told that China's first seven nuclear weapon tests all used highly enriched uranium (93.5% U-235) as primaries because the Soviets had pulled their support for China's plutonium production reactor. China's third test was China's first use of thermonuclear material. By the sixth test, China had developed a thermonuclear weapon with a yield of 3.3 megatons. My trip to this facility was unique: more Americans have walked on the Moon than on China's nuclear weapons test site.
数据是没有人告诉你的，没有精准大量的数据，只能做第一个粗蛋，做更高级的东西则无以为继。
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