Zhang et al demonstrated that arylboric or arylcarboxylic acid derivatives co-doped in boric acid (BA) showed up to near-unity ΦPh for (acyloxy)boronic anhydride/BA system, while ultra-long tPh of 8.74 s was observed for a p-phenylenedicarboxylicacid/BA system (Figure ). Chen et al. showed that a hydrogen-bonded network between water, melamine, and aromatic carboxylic acids (TMA, Figure ) produced RTP with ΦPh of 46.1% and a τPh of 1.67 s for the mixture powder. Gao et al. set up a papermaking production line to produce RTP in a paper containing an arylboronic acid. These reports evidence that RTP can be triggered in hydrogen-bonded matrices but from the heterogeneity of examples it is unclear why certain systems enable RTP from the guest, and whether there are any general design rules for hydrogen-bonded host-guest systems to activate an efficient RTP.