How exactly does your trip look like?
27 Dec - 2 Jan: Northern Vietnam (Trang An WHS, Ho Citadel WHS, Yen Tu TWHS (aiming for Vinh Nghiem Pagoda near Bac Giang), Hanoi).
2 Jan - 3 Jan: Night train Hanoi tot Ningming in China (I actually need a proper Vietnamese visa for this, as the e-visa is not valid for this exit point!
3 Jan - visit Zuojiang Huashan WHS, overnight in Nanning
4 Jan - bullet train Nanning - Kunming, overnight in Kunming
5 Jan - Chengjiang WHS, overnight in Kunming
6 Jan - Bus Kunming - Yuanyang, overnight in Yuanyang
7 & 8 Jan - Hani Rice Terraces WHS, overnight in Yuanyang
9 Jan - Bus back to Kunming, evening flight to Xiamen, overnight in Xiamen
10 Jan - Gulangyu WHS, overnight in Xiamen
11 Jan - Quanzhou TWHS, overnight in Xiamen
12 Jan - Bus to Liulian for Fujian Tulou WHS, overnight in a Tulou in Liulian
13 Jan - Bus back to Xiamen, overnight in Xiamen
14 Jan - flight home