Can Tremella and white wood ear be used interchangeably?
Generally speaking, Tremella fuciformis (silver ear fungus) and white wood ear are the same ingredient and can be used interchangeably in daily consumption and regular cooking. Detailed analysis is as follows:

In common cooking scenarios such as making soups or stewing, there is no difference between the two in terms of texture and nutritional content. Whether used in making sweet soups or as side dishes, substituting one for the other will not affect the taste or quality of the dish and will achieve the same culinary effect.
In certain situations where specific physical characteristics of the ingredient are required, for example, when a particular size or soaked condition of silver ear fungus is needed but the white wood ear on hand does not match these characteristics, some processing may be required before substitution. However, fundamentally, the two can still be used interchangeably without changing the inherent properties of the ingredient.
Before consumption, ensure that the silver ear fungus or white wood ear is fully soaked and thoroughly cleaned to avoid any residual impurities. If any abnormal reactions such as gastrointestinal discomfort occur after consumption, stop eating the product immediately and seek medical attention promptly.