Core Viewpoint - The article discusses advancements in 4D printing technology, particularly focusing on a new method for ceramic 4D printing driven by hydrogel dehydration, which allows for the creation of complex structures without the need for molds or external forces [2][3][4]. Group 1: 4D Printing Technology - 4D printing is a novel additive manufacturing technology that enables the creation of three-dimensional structures from smart materials, which can change shape over time when stimulated by external factors such as light, heat, or electricity [12]. - Current 4D printing materials are primarily limited to soft materials like hydrogels and shape memory polymers, with significant challenges remaining for hard materials like ceramics [2][3]. Group 2: Research and Development - A collaborative research team from Southern University of Science and Technology has developed a hydrogel-driven ceramic 4D printing method, utilizing light-sensitive ceramic elastomer slurries and acrylic hydrogel precursors suitable for DLP printing [3]. - The developed materials can undergo significant deformation, with the ceramic elastomer capable of withstanding up to 700% tensile strain and the hydrogel achieving a volume shrinkage of up to 65% during dehydration, along with a modulus increase of over 40 times [3]. Group 3: Upcoming Forum - Professor Ge Qi will present on "Multi-material 3D/4D Printing: From Hydrogels to Ceramics" at the 2025 (4th) Polymer 3D Printing Materials Summit Forum, scheduled for July 18-20, 2025, in Hangzhou, Zhejiang [5][8]. - The forum aims to facilitate discussions on high-precision 4D printing equipment, advancements in high-performance light-curing smart materials, and design methodologies for multi-material 4D printing [12].