Survival in the apocalypse: I exploited a bug in an infinite dungeon.

As we all know, rainwater in real society is not simply water.

During the formation of rainwater, a large amount of dust, bacteria, viruses, microorganisms, and chemicals are adsorbed.

Therefore, rainwater is not clean.

Acidic substances in the atmosphere (such as sulfur dioxide and nitrogen oxides) react with water to form rainwater with a low pH value.

Rainfall with a pH value less than 5.6 is generally defined as acid rain.

Rainwater with a pH value between 4.5 and 5.6 is called weakly acidic rain.

A concentration of less than 4.5 indicates severe acid rain, also known as "strong acid rain".

Experiments have shown that acid rain with a pH value below 4.7 can convert organic lead in the soil into inorganic lead.

Inorganic lead can inhibit cell division in plant roots, allowing spores of various bacteria and viruses to directly invade and kill the roots.

If the pH value is less than 3.5, acid rain can also directly damage the surface of the leaves, causing them to wither and die.

Given the large number of factories in Anxi City, it's not surprising that it has become a "severely affected area by acid rain".

What she didn't expect was the topographical map of Anxi City.

The moment Shi Jinwei saw a certain spot, she could hardly believe her eyes.

The overall topographic map of Anxi City is still a bit small when viewed on a mobile phone.

Seeing a bookstore nearby, I went in immediately and bought a map of the city.

Due to the mission requirements, global or national maps cannot be purchased here.

Even when downloading on a mobile phone, the maximum download limit is the same as before: only topographic maps of a few nearby cities can be downloaded.

She didn't think much of it and bought the largest size.

Then I sat down in the reading area set up in the bookstore and took out the "Food Factory Map" and the Anxi City Map to compare them.

In the lower left corner of the Anxi City topographic map, there is an area whose terrain is more than 75% similar to that of the food factory.

The sign reads "Anxi Industrial Zone," which occupies one-third of the entire Anxi City.

She took out the prop phone she bought from the prop store and used a scanning app to scan the map of Anxi City into the phone.

Only then did he get up and leave to go to the supermarket.

This intelligence is indeed important, but not as important as preparing supplies.

I bought enough instant food and water at the supermarket.

As for fast food and hot meals, she plans to do the same as last time: order a hotel room and order takeout.

Once all the takeout is collected, I can find another place to stay.

There's a pharmacy downstairs in the supermarket; I bought all my medicine there.

Because this instance involves acid rain, I specifically bought ointments such as hydrocortisone ointment, clindamycin gel, or metronidazole ointment.

If your skin gets wet and you can't get medical attention, you can use these ointments as needed.

In addition, I searched online and bought boric acid solution, ethacridine solution, aluminum acetate solution, magnesium sulfate solution, iodine tincture, etc.

Finally, she also bought a lot of high-concentration sodium bicarbonate solution and soda water.

Whether we'll actually use it is uncertain, but we must prepare it.

Having food, water, and medicine readily available constitutes acid rain protection equipment.

Perhaps because this city experiences frequent acid rain, there are an unusually large number of protective gear shops.

Even the most basic umbrellas are made of acid rain resistant materials.

Of course, the price is also particularly painful.

However, Shi Jinwei is not short of money, so she buys without hesitation.

Total purchase: 40 sets of thickened acid rain protective suits (with shoes, gloves and masks).

20 acid rainproof raincoats.

20 pairs of acid rain resistant gloves.

20 pairs of acid rain boots.

It is feared that after acid rain, the air will be filled with acidic substances that are harmful to the respiratory tract.

She also bought oxygen cylinders for several dozen days.

It was rare to encounter such a big customer, and when the shop owner paid the bill, he deliberately sized up Shi Jinwei a few times.

However, Shi Jinwei's words dispelled all the other party's doubts.

"Please give me an invoice, I need to get reimbursed by my company," she said.

The shop owner looked somewhat reluctant after hearing this.

Asking for an invoice means he has to pay taxes.

This girl bought 25000 coins worth of equipment in one go.

He originally thought it was a personal expense, and if the other party didn't ask, he would pretend not to know and not issue an invoice.

I never expected she was buying for the company; my heart suddenly started to hurt.

She tossed her things into the specially purchased duffel bag, carefully collected the invoice handed to her by the shopkeeper, and walked out of the store satisfied.

I learned this trick from a forum.

Previously, in order to buy things without attracting the attention of NPCs and nearby players.

I always have to visit several stores.

Later, I saw on the forum that someone placed an order under the guise of a company procurement.

This will dispel many people's concerns.

She didn't buy much equipment in the first few dungeons.

There wasn't even a chance to test it.

I tried it this time, and it really worked.

New skill acquired.

After buying the armor, the next step is to find a place to stay.

She first found a short-stay room nearby and ordered takeout.

While waiting for my takeout, I was also thinking about housing.

Under normal circumstances, even if acid rain is highly acidic, it is difficult for it to completely corrode a building within twenty days.

Of course, if it's strong sulfuric acid, that's a different story.

Given the current difficulty of the dungeon, acid rain can be considered as sulfuric acid.

Otherwise, it would be a disservice to the game's difficulty level.

She wasn't good at chemistry, so she specifically looked it up on her phone.

Depending on the building materials, temperature, and humidity, the rate at which stone, bricks, glass, plastics, and metals corrode varies.

It can be done in as little as a few hours.

The longest can be several years (these are just general theories, don't take them too seriously, just consider them as speculation).

Overall, the materials most resistant to concentrated sulfuric acid corrosion are glass, polytetrafluoroethylene (PTFE), and Hastelloy.

Glass is the easiest thing to get your hands on.

She looked up Hastelloy but didn't find much information.

The acid rain protection gear she bought was mostly coated with polytetrafluoroethylene (PTFE).

Polytetrafluoroethylene is also widely used in Anxi City.

Many buildings are coated with this film to make them waterproof and moisture-proof.

This also inspired Shi Jinwei.

She plans to create a separate, highly acid-resistant cabin, just like the one in the Tsunami instance, and place it in the space.

If ordinary buildings cannot withstand super acid rain, she will take shelter in the small house.

"Knock knock knock." The knocking interrupted Shi Jinwei's thoughts.

The food deliveries started arriving one after another.

She placed orders with more than 30 companies this time, and the deliverymen lined up to come.

Fortunately, I moved to another location after receiving the takeout, otherwise it would have been easy for someone to keep an eye on me.

The last takeout order was Buddha Jumps Over the Wall.

It was noon when it was delivered.

We finished eating in the room and checked out.

I took a taxi to a nearby door and window company.

Most of these companies can customize sunrooms, and she plans to go and see if they have any ready-made glass rooms.

If not, just order one.

Fortunately, there really are sample sunrooms here.

The cost of a standard glass room is 200-300 coins per square meter.

Tempered glass rooms cost 500-1000 coins per square meter.

Laminated glass rooms are the most expensive, costing 800-1500 RMB per square meter.

There is a 30-square-meter finished apartment with tempered laminated glass, priced at 2000 coins per square meter.

The total cost is 6 coins.