Baidu’s Hong Kong-listed shares fell after Beijing’s market regulator summoned the company and other major platforms to address irregularities in online train ticket sales.
The regulatory meeting responded to public complaints regarding add-on charges and misleading booking practices ahead of the Lunar New Year.
Baidu’s stock declined 2% to HK$141.40 during Hong Kong trading.
Other technology heavyweights including Meituan and Tencent also recorded losses following the summons.
The Hang Seng Tech Index dropped 0.5% at the market open.