In this Week in Photos, visitors of a park in Shenzhen, Guangdong province, wishing to make the most of their three-day Tomb-Sweeping Festival holiday have to vie for space with rows and rows of shared bikes. Elsewhere, floating willow catkins and low-hanging clouds are source of wonder, and a cat being transported in its very own backpack gets a good look at Tongji University’s cherry blossom trees.