In addition, agents have searched Poland's Office of Electronic Communication (UKE) regulator, where the Polish suspect had also worked, according to TVP Info.
According to the Polish state television, the Deputy Chinese Ambassador in Warsaw visited the Polish Foreign Ministry, calling for consular services to have access to the Chinese detainee.
Just one month earlier, the GCSB had declined - when approached by Stuff - to confirm an Australia report that China was behind the espionage attacks on other "Five Eyes" countries dubbed "Operation Cloud Hopper".
Both men have reportedly heard the charges against them and will be held for three-months.
The Czech cybersecurity agency said that Chinese laws "force private companies with their headquarters in China to cooperate with intelligence services", which could make them "a threat" if involved with a country's key technology.
The Chinese telecoms giant is facing increasing scrutiny from the global community amid fears authorities in China could use the company's technology for spying.
Though the Canadian government launched a security review of Huawei's 5G technology past year, it is still a major supplier of telecommunications equipment in Canada and at least two major carriers have said they plan to test the company's 5G technology in small-scale pilots. The resume said he received a bachelor's degree in 2004 from the Beijing University of Foreign Studies.
Orange Polska's French parent company said this week it would no longer work with the Chinese company in France. She has been released on bail, but faces a lengthy legal fight over extradition to the United States.
In response, China has arrested a handful of Canadian nationals, apparently forcing a hostage standoff to get Meng back.
Wang's arrest plays into Western governments' fears that Huawei could be spying on behalf of China. The arrest is a fresh sign that a US dispute with China over its ban on the company is spilling over to Europe, Huawei's biggest foreign market.