A Swedish national and Hong Kong bookseller was detained again recently by Chinese police, over suspected violations of law. Gui Minhai was released in October 2017. But it appears his troubles are not over. CGTN's Zhao Yunfei has more.

After a tragedy that killed one person over drunken driving more than a decade ago, Gui Minhai fled the country in 2004. He turned himself in to police in China in 2015. Gui then completed a two-year prison term. But he was not allowed to leave the country according to law as the investigation into his business operation had not come to an end. After his release, Gui said in a letter of commitment to police in Ningbo, Zhejiang Province, that he would continue cooperating with authorities. During an interview with CCTV after he was detained, Gui said his life in Ningbo was calm.

GUI MINHAI "We planned to stay in Ningbo for a while. My mother's health wasn't in good shape. We rented an apartment in Ningbo and bought some furniture and household items. During this period of time, my wife came to Ningbo from Germany. We spent a whole month together, and we had a good time."

Gui also promised in the letter of commitment that he would inform authorities if he leaves the city. But he was found on Jan. 20 in Shanghai riding a car accompanied by two Swedish diplomats, and then boarded a high-speed train bound for Beijing. Chinese police say Gui was carrying a lot of materials concerning state secrets, and was suspected of illegally providing state secrets and intelligence overseas, endangering state security. When the high-speed train stopped at Jinan West Railway Station in Shandong Province, police took Gui away and put him under custody.

Shortly after Gui's arrest, China's public security authorities informed the Embassy of Sweden of Gui's case through the Ministry of Foreign Affairs. China's foreign affairs authorities also informed their Swedish counterparts about Gui's case. Zhao Yunfei, CGTN.