Dots in a circle Multi-Cache
erik88l-r: Cache is apparently gone, cache owner has not logged on in 6½ months, so I have archived it for him. Thanks for the past fun.
erik - geocaching.com volunteer cache reviewer
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Difficulty:
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Terrain:
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Size: 
(small)
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A cache in a nice park in Shanghai. You can get there easily by metro (line 2). Get off the station "Shanghai Science & Technology Museum".
Ok... you got off the metro, so let's start at the square between the two exits! The coordinates for the startposition are:
N 31°13.309 / E 121°32.320
If you have a look around, you'll see it is the most
beautiful metrostation in Shanghai ;-)
For a long time this was the metrostation near my home before I moved to Lujiazui.
Make sure you have the "8 poles" in your back and face to the "broad footpath" in ESE-direction. Follow the way to the entrance of the park.
At the gate of the park -unfortunately- you have to pay the charge of 10 kuai to get in.
If you paid the fee and are still interested in finding the cache, go to the following coordinates, so you can start the hunt:
STAGE 1:
N 31°13.128 / E 121°32.692
There you'll see some pillars. The quantity of the poles is A. Now, you can calculate the next coordinates with the given formula:
B=A+2
C=B-1
The new coordinates are:
N 31°13.(B-C)AA / E 121°33.(C-A)CB
STAGE 2:
The small pavilion-like building with its two cupolas, which used to be the former stage 2 and eponym of the cache, is gone already. That's why, I had to change this point to the current one! (Hope it will survive a little longer!)
Now, you will be standing on a bridge, if you've done everything right to here. Please count the number of the artful steel-grids between the pillars and note it as D.
The coordinates for the last intermediate point are:
N 31°13.0(3*D+(A+C)) / E 121°32.9(2*A+B)
STAGE 3:
At this point you will see an information board. On the map there are some landmarks, each of them has a different number. Use the numbers to complete the coordinates for the cacheposition:
E: landmark no. Bright Lake
F: landmark no. Potted Landscape Garden
G: landmark no. Green World (Embossment)
N 31°12.E(G-C/3)B / E 121°32.E(C-A)G
CACHE PLACE:
At the cacheplace be careful with the sharp-edged stones!
The cache is a small box (meanwhile "upgraded" to a watertight click-lock-box, so the old plastic bag isn't needed anymore).
Make sure, that you put back the cache in the same position and cover it again, so it is not seen directly... thank you!
Additional Hints
(Decrypt)
Erzrzore lbhe zngu-yrffbaf: svefg zhygvcyl nf gur pnfr zl or qrivqr naq gura fhz naq fhogenpg!
Gur pnpur vf haqre n ovt, syng fgbar naq pbirerq jvgu bgure fgbarf!