def iszh(text):
    """check if text is Chinese

    Args:
        text (str): text

    Returns:
        bool: True if text is Chinese, False otherwise

    Examples:
        >>> iszh("比如")
        True
        >>> iszh("比如Convolutional Neural Network，CNN对应中文是卷积神经网络。")
        False
    """
    for ch in text:
        if not "\u4e00" <= ch <= "\u9fff":
            return False
    return True