Guilin has 3 main area with lots of scenic place for photography. 1) Guilin (main city) 2) Yang Shuo (阳朔)and 3) Long Sheng (龙胜
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If you have limited days like 4 days 3 night there, I will suggest you book your hotel based in Yang Shuo. There has a big concentration of old town, river cruise, mountains, etc. But that will means you have to fly to Guilin, then immediately get a bus ticket at their bus interchange to Yang Shuo which is about 2hrs away.
Long Sheng is north part of Guilin, also about 2hrs from the main city, to me is a must visit to the 2 villages namely 大寨 and 平安寨. I stayed only 1 night at 平安寨. The main highlight for photography there is the 龙脊梯田. Though April was not the best time for great pictures (However the weather was very nice, day time average 21 degree and night time about 18 or 19 degree). The local told me to go before or after 端午节, which is 1 week before or after June 20. By then the padding field steps are all filled with water, you get breath taking pictures during sunrise or sunset. 2nd best time to go would be after September 24, according to the villager. By then the crops has turn yellow and they say it's very beautiful and at the same time the tourist is not as heavy compared to other months.
The pictures I shared was taken from 老寨山. If you decide to climb this mountain make sure it was not raining and you have enough rest and water plus a torch light (should u decide to take sunset pics). This mountain is considered dangerous but if you are careful and with the right shoe you will make it to the top like I did. Locals told me few person already fell to their death in this mountain. Along the way up there are tombs too. But once you get to the top it was all worth it.
For my April trip I was based in Guilin main city and stayed at 好地方江景酒店. Pretty good hotel and good location too. Just around the corner you get a walking street with lots of food and shopping and 24hr convenient store.