(210914) -- MACAO, Sept. 14, 2021 (Xinhua) -- Cheong Weng Chon (3rd R), secretary for administration and justice of the Macao Special Administrative Region (SAR) government, and Ao Ieong U (4th R), secretary for social affairs and culture, attend a press conference in Macao, south China, on Sept. 13, 2021. Institutional innovation and rule of law are vital to the steady and sustained development of the Guangdong-Macao in-depth cooperation zone in Hengqin, the Macao SAR government said Monday. The central authorities earlier this month made public a general plan of building the Guangdong-Macao in-depth cooperation zone in Hengqin, which is located in the southern part of Zhuhai city in Guangdong Province, just across Macao, to facilitate Macao's better integration into the overall national development. (Xinhua)