Thank you for submitting your items for appraisal. These appear to be decorative chinese watercolours by an unknown painter after 黄胄（1925－1997）. Huang Zhou / Liang Gantang is known for his portraits of people in Xinjiang Uygur Autonomous Region and also animals, especially donkeys. His technique of using ink wash is highly skilled. The two watercolors in your possession are not inspired and miss the quality, plus the red chop mark differs in details from the artist´s seal ( compare lower part of the 胄character with authentic watercolors in museum collections) . These two watercolours are decorative and possibly a nice travel souvenir with sentimental value, but they do not represent a monetary value.