Thank you for submitting your items for appraisal. These appear to be acrylic on canvas paintings, signed 文涓, most likely 杜文涓 Du Wen Juan. Unfortunately very little information can be found regarding this artist and the images available online have a low resolution, I can therefore only attribute it to the artist. Apparently the artist got a Bachelor of Arts in Decorative Painting and Master of Arts in painting Tsinghua University, and Doctor of Arts in Painting, Tsinghua University and is now an Associate Professor, School of Advertising Arts, Beijing Finance and Trade Vocational College. There are no auction results for his paintings yet on the secondary art market. The estimate is based on similar paintings by lesser known artists sold at auction. The future will show how prices for this artist will develop, there is good potential.