Based on the financial data provided in the materials, use Zhen Hua Company as the comparable entity. Evaluate the value (per share) of Sobright Company using the three different valuation-models: Price-to-earnings ratio (P/E) model; price-to-book ratio (P/B) model; and price-to-sales ratio (P/S) model, respectively. Besides, indicate the limitations of using P/B Model.

柔顺性高分子链能够通过内旋转作用改变其构象的性能称为高分子链的柔顺性。