We examine the impact of China's anti‐corruption campaign on firm‐level financial reporting quality (FRQ). As an important component of the anti‐corruption campaign, in October 2013, “Rule 18” was issued to prohibit party and government officials from serving as directors for publicly listed firms. The regulation led to a large number of official directors resigning from their roles as directors involuntarily. As such, Rule 18 has effectively weakened, if not fully discontinued, the political connections of the firms that previously hired officials as directors. Our empirical analyses employ a difference‐in‐differences research design with firm fixed effects and propensity‐score matching to examine the pre‐ and post‐period FRQ around the enactment of Rule 18. We find that, compared to propensity‐score‐matched control firms, FRQ of firms with resigned official directors increases after Rule 18. Further evidence suggests that the impact is stronger when firms are located in regions with more developed financial markets and in regions with higher judiciary efficiency. We also find that the effect is more pronounced when firms are non‐state‐owned, received preferential credits, and face refinancing pressure.

We examine how short sellers affect long‐run management forecasts using a natural experiment (Regulation SHO) that relaxes short‐selling constraints on a group of randomly selected firms (referred to as pilot firms). We find that compared to other firms, the pilot firms issue more long‐run good news forecasts but do not change the frequency of long‐run bad news forecasts. The increase in good news forecasts is greater when the pilot firms have higher‐quality forecasts, greater uncertainty about firm value, or higher manager equity incentives. Overall, these results and the results of additional analyses indicate that the reduction in short‐selling constraints and the increase in short‐selling threat induce managers to enhance disclosures through more long‐run good news forecasts to discourage short sellers.