David Manual Hebei Xiaowopu world habitat awards rammed earth building 2020 chairman sung bailey bridge manual design footbridge COVID-19 Yunnan video xiaowopu 2018 2019 WZQ_ChitChitCorner interview shaanxi macha sharing gansu leadership sir_david hebei Gansu rammed_earth Interview photo_competition BRIDGEWITHSOULS bailey_bridge press_conference workshop activity project greetings 2021 investagation volunteer_service serveHK newsletter local_volunteeing WZQ_AMemoryJourney ceremony Building with Earth Macha village Terrafibre Award annual review activity review covid19 2022 community_enrichment Wooden stool mui tsz lam Mui Tsz Lam wooden stool book fair 2022 Discover the Other Side of the World International Youth Day Design Thinking Workshop Lantian Theater Medical Student Fu Tei Au Tsuen HSU WZQ The University of Hong Kong Enrichment Year Exhibition UST WZQm bailey bridge exhibition Tongji university gold medal Shanghai Social Organization Public Welfare Entrepreneurship Competition Coordination Council chinanews youth development wuzhiqiao HKU bridging hearts sustainable development climate change market Endless Learning board retreat bailey bridge workshop youth committee xmas celebration SWOT analysis Restoration of Ancient Trails Camp Construction Youth Youth Development Rural Conservation Hakka food and culture Merry Christmas review RuralConservation YouthCultivation SheungShui FuTeiAu wzq youth member taskforce DoshaWoodcraft Carpentry Workshop Reopening of borders project restarts Wu Zhi School lesson4 rural conservation kuk po village Carpentry Workshop Lingnan University credit-bearing service-learning course oral history mui tsm lam village chines new year lunar new year Campsite Ancient Trails Handmade Trail HKCSS Wu Zhi Academy Volunteer Service Field Trip Kuk Po First Aid Training Course Yung Shue A Lai Chi Wo Community Kitchen Service-Learning Course Dongchuan Village World Water Day Guided Tour