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"Education on national security should start with the Constitution," said Wong Kam-leung, chairman of the Hong Kong Federation of Education Workers, noting that China's supreme law clearly lays out the requirement to protect national security and interests, safeguard the nation's unity and all ethnic groups' solidarity, and protect the country from invasion.

"Everyone can quickly comment or post articles in the internet era, but if they don't clarify that they are the owners of the works or disclose their copyright registration at government agencies, it'll be a challenge for others to find out where the works are originally from, let alone get authorization after contacting the authors," Liu said.

"During the recent years, we have geared up to push the integration of big data and the real economy for governmental, commercial and civilian use," Li said.

"Explain to me the purpose behind the tariffs and the long-term view. What do you expect to get out of this? I don't know what the end game will be and the outcome for the US," he said.

"Exhibits from my institute have the cutting-edge technologies in this field and represent China's overall capability in electronics," he said. "Only a handful of nations, such as the United States, France and Israel, are able to develop such technologies and make advanced radars. It's fair to say we are a leader in this field."