The company's high P/S ratio is justified by its expected revenue growth, outpacing the Aerospace & Defense industry. Investors' faith in the company's prosperous future potential and remote risk of revenue decrease supports the high P/S ratio, making a significant share price drop unlikely.

Chengdu M&S Electronics TechnologyLtd's decreasing ROCE trend is concerning. The company's reinvestment has not yielded improving returns, suggesting investors seeking high returns may need to look elsewhere.

Despite the high P/S ratio compared to its industry peers, it appears that investors are confident in the company's future revenues and are willing to pay more for the stock, providing support to the share price.