The Fixed Floor-Mounted Lecture Hall Desk-Chair Set with Fixed Writing Tablet, model YA-009, is a purpose-built public seating solution designed for high-occupancy, structured learning and event spaces. Delivered as an unbranded, configurable system, the set features a clean, coordinated visual profile with matte blue molded plastic seat and backrest shells, light beige powder-coated steel framing, a light neutral matte continuous worktop, and light gray front modesty panels. Units connect seamlessly end-to-end to form straight, custom-length rows, with permanent floor mounting via hidden T-base legs and expansion bolts that eliminate unwanted movement after installation. Construction prioritizes long-term durability for frequent daily use. The ergonomically curved seat and backrest shells are formed from molded PA+GF engineering plastic, supported internally by bent plywood or equivalent board, and paired with fixed integrated armrests that have a steel support core and molded plastic top cap aligned to the work surface. The frame and legs use cold-rolled steel square tube with an electrostatic powder-coated finish, secured to floors via hot-rolled stamped steel foot plates with a three-hole mounting design. The continuous high-pressure laminate writing worktop features PU edge binding, with a 15mm melamine-faced high-density fiberboard modesty panel running full row length to block cross-row leg visibility and add structural rigidity. Each seat includes an open powder-coated steel underseat rack, with all fasteners finished with matching plastic screw caps for a polished appearance. Functional design is tailored to focused, structured use. The fixed worktop has no folding or rotating mechanisms, and the seat and backrest are positioned at a consistent ergonomic angle with no recline or rotation to maintain sightlines. Adjustable leg heights support installation on stepped, tiered floors while preserving a consistent writing surface height across rows. The underseat rack accommodates bags, books, and personal items, and the fixed per-seat positions maintain clear separation between users. This set is well suited for university tiered lecture halls, corporate training rooms, multimedia classrooms, public institution conference auditoriums, vocational school training centers, and dedicated exam and testing centers. When planning procurement, note that units ship as 4-seat sets split across multiple cartons, with on-site assembly required for each row, and the system supports flexible row length configurations to match unique room dimensions.