6 days solo traveling in Guangdong - China: one backpack

Previously, I’ve done week-long winter trips with one carry-on suitcase (rimowa classic cabin 55x40x23cm), and up to 5 days with a single backpack. Since it’s going to be hot and humid in the South of China, and I’ll be moving around between cities quite a lot, I wanted to keep it light this time. I reckon a 14l backpack is pushing it slightly but it seems to work?

Any tips would be highly appreciated!

List: - Backpack: Sandqvist Ilon (26x38x12cm, 14/18l) - Top left: Muji organiser with my clothes 5x Uniqlo Supima Cotton Tshirts 5x Uniqlo Cotton Briefs, 5 pairs of Uniqlo ankle socks, 1 pair of Uniqlo trousers 1 pair of Uniqlo Airism shorts - Uniqlo pocketable waterproof/rain jacket - Bose QC35, power bank, cables, plug - Sunglasses - Cap - Deodorant, body wash, decanted perfume - Extra miscellaneous pouch for medication, etc (bottom left)