Are you saying that there were no German and Japanese spies in WW II working for their respective countries?
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Chapter 37
Deng Xiaoping's China
The Malaysians must be suspicious of Deng. There were underlying suspicions and animosity between Malay Muslims and Chinese in Malaysia, and between Indonesians and their ethnic Chinese. Because China was exporting revolution to Southeast Asia, my Asean neighbors wanted Singapore to rally with them, not against the Soviet Union, but against China.
Asean governments regarded radio broadcasts from China appealing directly to their ethnic Chinese as dangerous subversion. Deng listented silently. He had never seen it this light: China, a big foreign power, going over the governments of the region to subvert their citizens. I said it was most unlikely that Asean countries would respond positively to his proposal for a united front against the Soviet Union and Vietnam and suggested that we discuss on how to resolve this problem. Then I paused.
Deng's expression and body language registered consternation. He knew that I had spoken the truth. Abruptly, he asked, "What do you want me to do?" I was astonished. I had never met a communist leader who was prepared to depart from his brief when confronted with reality, much less ask what I wanted him to do. I had expected him to brush my points aside as Premier Hua Guofeng had done in Beijing in 1976 when I pressed him over the inconsistency of China's supporting the Malayan Communist Party to foment revolution in Singapore, not Malaya. Hua had answered with bluster, "I do not know the details, but whenever communists fight, they will win." Not Deng. He realized that he had to face up to this problem if Vietnam was to be isolated. I hesitated to tell this seasoned, weather-beaten revolutionary what he should do, but since he had asked me, I said, "Stop such radio broadcasts; stop such appeals. It will be better for the ethnic Chinese in Asean if China does not underline their kinship and call upon their ethnic sympathy. The suspicion of the indigenous peoples will always be there, whether or not China emphasizes these blood ties. But if China appeals to these blood ties so blatantly, it must increase their suspicions, China must stop radio broadcasts from south China by the Malayan and Indonesian Communist Parties.
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Essentially, during the Cold War, China committed racially based espionage and tried to foment revolutions throughout Asia wherever there is a Chinese population in the host countries. You are looking at at least three countries that were mentioned in Lee's memoir: Singapore, Indonesia, and Malaya, but there was no doubt in Lee's mind that China's attempt reached throughout Asia. Race was and still is a major component in China's espionage toolbox.