中文：

R-003是什么股票？R-003指的是在中国股票市场中，按照股票代码分类的一种股票。具体来说，R-003指的是在上海证券交易所上市的、以人民币计价的、无涨跌幅限制的、非ST或*ST的股票。

这种股票通常被认为是一种相对较为活跃的股票，因为它们可以在交易日内进行买卖，而且没有涨跌幅限制，因此具有较高的波动性和风险性。此外，R-003股票通常也被视为一种相对较为安全的投资选择，因为它们不是ST或*ST股票，因此不会因为业绩不佳或其他异常情况而面临退市的风险。

对于投资者来说，选择R-003股票进行投资需要具备一定的投资经验和风险意识。由于这种股票的波动性较大，投资者需要做好风险管理，合理配置资产，避免投资风险过大。此外，投资者还需要了解相关的政策和规定，以便更好地把握投资机会和风险控制。

英文：

What is R-003 stock? R-003 refers to a type of stock classified by stock code in the Chinese stock market. Specifically, R-003 refers to a stock listed on the Shanghai Stock Exchange that is denominated in Chinese yuan, has no limit on price fluctuations, and is not an ST or *ST stock.

This type of stock is usually considered a relatively active stock because they can be bought and sold during trading days without restrictions on price fluctuations, and therefore have higher volatility and risk. In addition, R-003 stocks are usually seen as a relatively safe investment option because they are not ST or *ST stocks and are not subject to the risk of delisting due to poor performance or other abnormal circumstances.

For investors, choosing R-003 stocks for investment requires a certain level of investment experience and risk awareness. Due to the high volatility of this type of stock, investors need to manage risks, allocate assets reasonably, and avoid excessive investment risks. In addition, investors need to understand relevant policies and regulations to better grasp investment opportunities and risk control.