The recent sell-off in SGSG Science&Technology Zhuhai's shares could present an opportunity if there are signs of a long-term growth trend in the company's fundamentals. However, investors should be aware of the 1 warning sign spotted with the company.

Despite poor financial performance and declining revenue, the company's high P/S ratio indicates investor optimism. However, recent negative growth rates may sour sentiment, potentially leading to a challenging period for shareholders.