Abstract: Major national science and technology infrastructures, the High Intensity Heavy-ion Accelerator Facility (HIAF) and The China initiative Accelerator Driven System (CiADS) are under construction in Huizhou, Guangdong Province, China. HIAF, which aims to build a next-generation, world-leading high intensity heavy-ion accelerator, started construction in 2018 with a seven-year construction period and has now entered the phase of batch processing and testing, as well as on-site installation and commissioning. CiADS is proposed to be the world's first megawatt-scale accelerator-driven transmutation research facility to realize high-power coupled operation, started construction in 2021 with a construction period of six years. The construction is progressing in phases, the accelerator has started on-site installation, the high-power target has completed prototype development and the subcritical reactor is under engineering design. Building on the previous article which introduced the basics of the HIAF and CiADS projects, this paper further describes the scientific and engineering objectives, process development and civil progress, and provides an outlook on future developments.