Seasonal travel tips for NYCA→XIY in December focus on weather, packing and itinerary flexibility. Primary keywords: Xi'an December travel tips, NYCA to XIY winter packing. Secondary/LSI keywords: winter layering, travel insurance for December storms, visa timing. Key tips: pack a warm coat, thermal layers, and rainproof shoes; allow extra transit time at NYCA for snow, and build buffer time on connections; confirm attraction hours as some sights may shorten winter times; consider travel insurance or change-flexible fares for holiday travel disruptions. Health & comfort: bring portable hand warmers, check indoor heating in older hotels, and sample winter street food in heated market stalls. CTA: Prepare for comfortable December travel—pack smart and book flexible fares for NYCA→XIY journeys.