High P/S ratio may reflect expectations of the company outperforming the industry. However, with recent poor growth, these prices may not be sustainable. Unless significant improvements occur, the current share price may seem unfair to investors.

China Ocean Group's high price-to-sales ratio may seem justified given expected revenue performance. However, due to mediocre medium-term revenue growth, this high ratio could be unsustainable, potentially putting investors at risk of overpaying.