Reef dwellers: Echinoderms, brachiopods, gastropods, benthic foraminifera, and calcareous algae. Rock type and reef-related depositional characteristic: Reef core:  less sponge framestone and more bafflestone and sponge-Tubiphytes-cyanobacteria bindstone. Reef type: Skeletal mound at the carbonate intraplatform. Coordinates stated in text: 106.50 E, 29.87 N, 40 m (part thick-ness). Comments for Laolongdong from Tian & Wang, 2021: Reef builders: Frame-building and baffling organisms: hypercalcified sphinctozoan and inozoan sponges, hydrozoans, and bryozoans. Binding organisms: Archaeolithoporella, Tubiphytes, sclerosponge, and cyanobacteria. Reef dwellers: Echinoderms, bivalves, brachiopods, gastropods, benthic foraminifera, calcareous algae, and less rugose corals. Rock type and reef-related depositional characteristic: Reef core: sponge and hydrozoan bafflestone. Reef flat: bioclastic Colaniella- bryozoan-crinoid packstone to grainstone and bryozoan-echinoderm wackestone with reef breccia. Reef crest: foraminiferal-algal wackestone to packstone Reef base: bryozoan-crinoid packstone. Reef type: Skeletal mound at the carbonate intraplatform. Coordinates stated in text: 106.51E, 29.89N 36.33 m thick.