The premise of all this is that the local products and souvenirs of tourist destinations can meet the needs of tourists, and they can win the trust of tourists with excellent quality and service. Although more and more places now have their own national geographic certification Products can be directly converted into tourist souvenirs or local products on the shopping list of tourists, but due to management and other issues, the quality of the products is uneven, and even fake and shoddy products are rampant, which greatly suppresses tourists' purchase desires and damages local tourism. The image and reputation of the market. "All of this" in the text most likely refers to:. ['Tour guides gain the trust and love of tourists.', 'Local tourism administrations need to simplify administration and decentralization, and open markets.', 'Merchants selling travel souvenirs and local products can make a profit.', 'Tourists are willing to spend money on their favorite souvenirs and souvenirs.']