Regarding the key construction stages, teaching operation and acceptance skills: Analyze "wall construction process" (base treatment (leveling, wall anchoring and fixation), latex paint application (one base and two sides process, avoiding run-off), wallpaper installation (adhesive environmental friendliness and seam alignment)); Learn "floor construction norms" (tile laying (leveling layer thickness 3-5cm, void rate ≤ 5%), wooden floor installation (reserve 8-12mm expansion gap, laying moisture-proof membrane)); Master "acceptance standards" (wall surface flatness detected with 2-meter ruler (error ≤ 3mm), ground slope (1%-3% for bathroom to prevent water accumulation), waterproof test (closed water test for 24 hours without leakage))