Estun Automation's stock plummeted 14.66% in pre-market trading on Wednesday, marking a significant reversal following a period of exceptional gains.

The sharp decline comes as investors engage in profit-taking after the stock accumulated over 20% in gains across three consecutive trading sessions, triggering an abnormal trading volatility designation. Concurrently, uncertainty surrounds the company's disclosed plans to acquire 100% equity of Nanjing Estun Codroid Technology, a maker of collaborative robots and embodied intelligence robots.

The acquisition constitutes a related-party transaction and remains in preliminary planning stages with no binding agreement signed, creating material uncertainty. Market data also revealed significant institutional selling pressure prior to the movement, contributing to the downward momentum as investors reassess the stock's valuation amid the unresolved acquisition terms.