BackgroundIt　remains　unknown　whether　good　neighbourhood　perception　can　enhance　the　benefits　of　favourable　built　environment　to　physical　activity.　Moreover,　the　moderation　pattern　is　less　understood　in　developing　countries.ObjectivesThis　work　aims　to　examine　the　moderation　effects　of　perceived　neighbourhood　safety　and　aesthetics　on　the　relationship　between　built　environment　and　time　for　recreational　walking.MethodsWe　performed　the　examination　using　a　sample　of　760　residents　in　Fuzhou　City,　China.　The　Negative　Binomial　Regression　Model　was　developed　to　examine　the　moderation　roles　of　neighbourhood　safety　and　aesthetics　on　the　impact　of　built　environment,　adjusting　for　the　effects　of　location,　socioeconomic,　personal　preferences　and　social　environment　factors.　Moreover,　two　sensitivity　analyses　were　performed　to　test　whether　the　moderators　found　are　robust　to　the　control　of　residential　self-selection,　and　differential　measures　of　conceptually-comparable　aspects　of　built　environment.ResultsWe　found　stronger　associations　of　time　for　recreational　walking　with　road　density　and　proportion　of　parks　and　squares　POIs　for　residents　with　high　perception　of　neighbourhood　safety,　compared　to　those　with　low　perception　of　neighbourhood　safety.　There　was　a　greater　effect　of　the　proportion　of　parks　and　squares　POIs,　when　perceived　aesthetics　was　high　than　when　perceived　aesthetics　was　low.　The　findings　of　neighbourhood　safety　and　aesthetics　as　moderator,　were　robust　in　the　two　sensitivity　analyses.　No　significant　moderation　effect　was　found　for　land　use　diversity.ConclusionsHigh　perceived　neighbourhood　safety　can　magnify　the　positive　effects　of　road　connectivity　and　accessibility　to　parks　and　squares.　Neighbourhood　aesthetics　positively　moderates　the　association　of　time　for　recreational　walking　with　accessibility　to　parks　and　squares.　The　findings　emphasize　the　need　to　consider　safety-　and　aesthetics-specific　differences　in　estimates　of　built　environment　effects.　Improvements　in　neighbourhood　safety　and　aesthetics　are　key　to　effective　interventions　in　built　environment　to　better　promote　physical　activity.