Ancient Chinese secret - ended

The giveaway is level 1 and for https://store.steampowered.com/app/232890/Stronghold_Crusader_2/

solution:
OK I don't know if I can explain everything properly but I will try...

A large part of Daoism can actually be summarized in four short lines, or one even shorter sequence: 0 => 1 => 2 => 4 => 8 => 64

From zero comes one – From the Infinite (Wuji) comes the Supreme (Taiji)

From one comes two – From the Supreme (Taiji) comes the Duality (Liangyi) of Yin and Yang.

From two comes four – From the Duality (Liangyi) comes the Four Phases (Sixiang).

And the four are expressed through the eight – The Four Phases (Sixiang) are expressed by the Eight Trigrams (Bagua), and when the Bagua are combined with each other, they form 64 hexagrams that represent everything in the world.

So basically zero is the background which you can imagine goes on infinitely
One is the circle, the entirety of the drawing
Two is the black and the white. Two colors
Four is the yin yang symbol with Twp large black and white symbol which contain a smaller black and white dots, making four pieces of the ying yang
Eight is the eight Trigrams that surround the ying yang symbol
Sixty four is the outer ring of hexagrams, which I used to encode the URL

Hexagrams have a numerical value associated to them, form 1-64

01 ䷀ 02 ䷁ 03 ䷂ 04 ䷃ 05 ䷄ 06 ䷅ 07 ䷆ 08 ䷇ 09 ䷈ 10 ䷉ 11 ䷊ 12 ䷋ 13 ䷌ 14 ䷍ 15 ䷎ 16 ䷏
17 ䷐ 18 ䷑ 19 ䷒ 20 ䷓ 21 ䷔ 22 ䷕ 23 ䷖ 24 ䷗ 25 ䷘ 26 ䷙ 27 ䷚ 28 ䷛ 29 ䷜ 30 ䷝ 31 ䷞ 32 ䷟
33 ䷠ 34 ䷡ 35 ䷢ 36 ䷣ 37 ䷤ 38 ䷥ 39 ䷦ 40 ䷧ 41 ䷨ 42 ䷩ 43 ䷪ 44 ䷫ 45 ䷬ 46 ䷭ 47 ䷮ 48 ䷯
49 ䷰ 50 ䷱ 51 ䷲ 52 ䷳ 53 ䷴ 54 ䷵ 55 ䷶ 56 ䷷ 57 ䷸ 58 ䷹ 59 ䷺ 60 ䷻ 61 ䷼ 62 ䷽ 63 ䷾ 64 ䷿

The lines circling the symbol are

•䷚䷇䷑䷴䷜䷇䷌䷺䷌䷲
䷾䷷䷝䷷䷜䷮䷜䷷䷑䷥䷘
䷖䷵䷧䷚䷖䷙䷴䷜䷲䷹
䷣䷛䷶䷴䷯䷙䷶䷥䷶䷙䷖
䷅䷷䷘䷗䷴䷯䷚䷆䷙䷙
䷜䷦䷼䷯䷜䷷䷑䷲䷛䷶䷹
䷧䷚䷆䷽䷬䷙䷂䷵䷣䷜
䷧䷕䷳䷘䷖䷑䷥䷜䷢䷴䷲

which translates to

27 08 18 53 29 08 13 59 13 51
63 56 30 56 29 47 29 56 18 38 25
23 54 40 27 23 26 53 29 51 58
36 28 55 53 48 26 55 38 55 26 23
06 56 25 24 53 48 27 07 26 26
29 39 61 48 29 56 18 51 28 55 58
40 27 07 62 45 26 03 54 36 29
40 22 52 25 23 18 38 29 35 53 51

Next thing to know, how to count in Base 64

A=1. B=2,,, Y=25 Z = 26 a=27, b= 28... z= 52 0= 53 1= 54... 9=62

converting to base 64 you have

aHR0cHM6Ky
83d3cuc3RlY
W1naWZ0cy5
jb20vZ2l2ZW
F3YX0vaGZZ
cm8vc3Ryb25
naG9sZC1jc
nVzYWRlci0y

convert that to text you get: https:+/7ww.steamgifts.com/giveawa}/hfYro/stronghold-crusader-2
there are three typos in the URL but you can easy fix those by comparing it to other uls to get https://www.steamgifts.com/giveaway/hfYro/stronghold-crusader-2

View attached image.