Scholars discuss at a symposium on upholding and improving the "one country, two systems" in Shenzhen, south China's Guangdong Province, June 15, 2020. A symposium on upholding and improving the "one country, two systems" was held Monday in south China's Shenzhen to mark the 30th anniversary of the promulgation of the Hong Kong Special Administrative Region (HKSAR) Basic Law. Organized by the Chinese Association of Hong Kong and Macao Studies, the symposium was attended by about 200 people from the Chinese mainland, Hong Kong, Macao and overseas, including officials from China's central authorities. (Xinhua/Liang Xu)

Photo taken on June 15, 2020 shows the site of a symposium on upholding and improving the "one country, two systems" in Shenzhen, south China's Guangdong Province. A symposium on upholding and improving the "one country, two systems" was held Monday in south China's Shenzhen to mark the 30th anniversary of the promulgation of the Hong Kong Special Administrative Region (HKSAR) Basic Law. Organized by the Chinese Association of Hong Kong and Macao Studies, the symposium was attended by about 200 people from the Chinese mainland, Hong Kong, Macao and overseas, including officials from China's central authorities. (Xinhua/Liang Xu)

Chen Dong, deputy head of the Liaison Office of the Central People's Government in the Hong Kong Special Administrative Region (HKSAR), speaks at the opening ceremony of a symposium on upholding and improving the "one country, two systems" in Shenzhen, south China's Guangdong Province, June 15, 2020. A symposium on upholding and improving the "one country, two systems" was held Monday in south China's Shenzhen to mark the 30th anniversary of the promulgation of the Hong Kong Special Administrative Region (HKSAR) Basic Law. Organized by the Chinese Association of Hong Kong and Macao Studies, the symposium was attended by about 200 people from the Chinese mainland, Hong Kong, Macao and overseas, including officials from China's central authorities. (Xinhua/Liang Xu)

Scholars discuss at a symposium on upholding and improving the "one country, two systems" in Shenzhen, south China's Guangdong Province, June 15, 2020. A symposium on upholding and improving the "one country, two systems" was held Monday in south China's Shenzhen to mark the 30th anniversary of the promulgation of the Hong Kong Special Administrative Region (HKSAR) Basic Law. Organized by the Chinese Association of Hong Kong and Macao Studies, the symposium was attended by about 200 people from the Chinese mainland, Hong Kong, Macao and overseas, including officials from China's central authorities. (Xinhua/Liang Xu)

Deng Zhonghua, deputy head of the Hong Kong and Macao Affairs Office of the State Council, speaks at the opening ceremony of a symposium on upholding and improving the "one country, two systems" in Shenzhen, south China's Guangdong Province, June 15, 2020. A symposium on upholding and improving the "one country, two systems" was held Monday in south China's Shenzhen to mark the 30th anniversary of the promulgation of the Hong Kong Special Administrative Region (HKSAR) Basic Law. Organized by the Chinese Association of Hong Kong and Macao Studies, the symposium was attended by about 200 people from the Chinese mainland, Hong Kong, Macao and overseas, including officials from China's central authorities. (Xinhua/Liang Xu)