Hardware stores and home-improvement stores sell a variety of both chemical and natural repellent sprays. Purchase 2 or 3 and alternate them so deer don’t become accustomed to 1 of the scents. Follow the instructions printed on the packaging and apply as directed. Keep in mind that the spray will wear off after a rainstorm, and should be reapplied about 1-2 times per month even in dry weather.  Not all commercial deer repellents are environmentally friendly. Read the label before you purchase a repellent if you're concerned about the environment. This is especially important if you'll be spraying the repellent on a vegetable or herb garden. Also consider the smell factor when purchasing a deer repellent. If a spray is too odorous, you’re unlikely to want to sit in your garden or yard! A spray made from hot red pepper flakes works as a natural, environment-safe deterrent that won’t harm deer but will keep them away from your yard and plants. Cover the perimeter of your yard with the spray 2–3 times a month to keep deer out. Or, if you’re interested in protecting specific plants in a garden plot, spray plants that you don't want eaten by deer with a hot pepper spray. Make the spray by combining 1 gallon (3.8 L) of water with 3 tbsp (37 g) of crushed red pepper flakes. Simmer in a saucepan for 15 minutes, then mix in 2 teaspoons (9.9 mL) of liquid castile soap. Remove the liquid mixture from the heat and let it sit for 24 hours, then strain it into a plastic spray bottle. Deer dislike both the smell and the taste of soap. Sprinkling a few generous handfuls of it around the perimeter of your yard or garden beds can repel deer. You only need to reapply the soap to your yard about 1 time per month, or after a heavy rainstorm. To create the soap flakes, try grating off pieces of bar soap using a clean cheese grater. Or, use a kitchen knife to cut a bar of soap into 1⁄4 in × 1⁄4 in (0.64 cm × 0.64 cm) cubes. The human scent that emanates from the hair will deter the deer from entering your yard. Spread a generous...

TL;DR in Chinese:
在院子周围喷洒驱鹿液。 将辣椒水制成的天然驱逐剂洒在院子周围。 在院子周围撒4-5把肥皂片。 在院子里撒10-20把头发。 把2-3把头发放到袜子里，防鹿效果更持久。