# Feng Shui/Flying Star Feng Shui

Feng Shui | Flying Star | Geomantic Chart | Facing Palace | Facing Stars | Mountain Stars | Earth Base | 24 Mountains | Aquarium | Substitute Star | Xuan Kong Da Gua | Bazi & YiChing | Compass Location | 64 Hexagrams | River Map | 10-Combo | 1-Gua

## Introduction

In Flying Star Feng Shui, it is believed that the luck of a dwelling place depends on a number of factors, particularly the period in which the building is constructed. These periods are in blocks of 20 years each. For example, starting from 2004 is a block of 20 years known as Period 8. After these 20 years, we will be in a block of 20 years known as Period 9. The highest Period number is nine, so after another 20 years, it will start from Period 1 again, in a never-ending cycle.

## Periods and the Nine Palaces

The Period of a house is used to generate its Nine Palaces. The Nine Palaces Chart consists of a grid of 3 rows and 3 columns. The Nine Palaces Chart is used to determine the location of auspicious and inauspicious qi within a house or office building. To construct the Nine Palaces Chart, the Period of the house or building is used.
* Period 1
* Period 2
* Period 3
* Period 4
* Period 5
* Period 6
* Period 7
* Period 8
* Period 9

## The 24 Mountains in the 9 Periods

There are 24 Mountains in each of the 9 Periods, and they are listed in the table below, where the "PR" column gives the number of each Period, and P1 represents Period 1, and so on. The term "Period" has also been translated as "Age" by some authors.
| PR | Value of Outer Ring1 | Name and Direction of Outer Ring1 | Value of Inner Ring1 | Name and Direction of Inner Ring1 | Value of Inner Ring2 | Name and Direction of Inner Ring2 | Value of Outer Ring2 | Name and Direction of Outer Ring2 |
| P1 | 3-Jade | [E1:甲]Jia (+) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 8-White | [NE1:丑]Chou (-) |
| P1 | 3-Jade | [E2:卯]Mao (-) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 8-White | [NE2:艮]Gen (+) |
| P1 | 3-Jade | [E3:乙]Yi (-) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 8-White | [NE3:寅]Yin (+) |
| P1 | 2-Black | [SW1:未]Wei (-) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 9-Purple | [S1:丙]Bing (+) |
| P1 | 2-Black | [SW2:坤]Kun (+) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 9-Purple | [S2:午]Wu (-) |
| P1 | 2-Black | [SW3:申]Shen (+) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 9-Purple | [S3:丁]Ding (-) |
| P1 | 6-White | [NW1:戌]Xu (-) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 5-Yellow | [N1:壬]Ren (+) |
| P1 | 6-White | [NW2:乾]Qian (+) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 5-Yellow | [N2:子]Zi (-) |
| P1 | 6-White | [NW3:亥]Hai (+) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 5-Yellow | [N3:癸]Gui (-) |
| P1 | 4-Green | [SE1:辰]Chen (-) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 7-Red | [W1:庚]Geng (+) |
| P1 | 4-Green | [SE2:巽]Xun (+) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 7-Red | [W2:酉]You (-) |
| P1 | 4-Green | [SE3:巳]Si (+) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 7-Red | [W3:辛]Xin (-) |
| P2 | 4-Green | [SE1:辰]Chen (-) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 9-Purple | [S1:丙]Bing (+) |
| P2 | 4-Green | [SE2:巽]Xun (+) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 9-Purple | [S2:午]Wu (-) |
| P2 | 4-Green | [SE3:巳]Si (+) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 9-Purple | [S3:丁]Ding (-) |
| P2 | 3-Jade | [E1:甲]Jia (+) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 1-White | [N1:壬]Ren (+) |
| P2 | 3-Jade | [E2:卯]Mao (-) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 1-White | [N2:子]Zi (-) |
| P2 | 3-Jade | [E3:乙]Yi (-) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 1-White | [N3:癸]Gui (-) |
| P2 | 7-Red | [W1:庚]Geng (+) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 6-White | [NW1:戌]Xu (-) |
| P2 | 7-Red | [W2:酉]You (-) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 6-White | [NW2:乾]Qian (+) |
| P2 | 7-Red | [W3:辛]Xin (-) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 6-White | [NW3:亥]Hai (+) |
| P2 | 5-Yellow | [SW1:未]Wei (-) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 8-White | [NE1:丑]Chou (-) |
| P2 | 5-Yellow | [SW2:坤]Kun (+) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 8-White | [NE2:艮]Gen (+) |
| P2 | 5-Yellow | [SW3:申]Shen (+) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 8-White | [NE3:寅]Yin (+) |
| P3 | 5-Yellow | [E1:甲]Jia (+) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 1-White | [N1:壬]Ren (+) |
| P3 | 5-Yellow | [E2:卯]Mao (-) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 1-White | [N2:子]Zi (-) |
| P3 | 5-Yellow | [E3:乙]Yi (-) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 1-White | [N3:癸]Gui (-) |
| P3 | 4-Green | [SE1:辰]Chen (-) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 2-Black | [SW1:未]Wei (-) |
| P3 | 4-Green | [SE2:巽]Xun (+) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 2-Black | [SW2:坤]Kun (+) |
| P3 | 4-Green | [SE3:巳]Si (+) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 2-Black | [SW3:申]Shen (+) |
| P3 | 8-White | [NE1:丑]Chou (-) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 7-Red | [W1:庚]Geng (+) |
| P3 | 8-White | [NE2:艮]Gen (+) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 7-Red | [W2:酉]You (-) |
| P3 | 8-White | [NE3:寅]Yin (+) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 7-Red | [W3:辛]Xin (-) |
| P3 | 6-White | [NW1:戌]Xu (-) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 9-Purple | [S1:丙]Bing (+) |
| P3 | 6-White | [NW2:乾]Qian (+) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 9-Purple | [S2:午]Wu (-) |
| P3 | 6-White | [NW3:亥]Hai (+) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 9-Purple | [S3:丁]Ding (-) |
| P4 | 6-White | [NW1:戌]Xu (-) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 2-Black | [SW1:未]Wei (-) |
| P4 | 6-White | [NW2:乾]Qian (+) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 2-Black | [SW2:坤]Kun (+) |
| P4 | 6-White | [NW3:亥]Hai (+) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 2-Black | [SW3:申]Shen (+) |
| P4 | 5-Yellow | [SE1:辰]Chen (-) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 3-Jade | [E1:甲]Jia (+) |
| P4 | 5-Yellow | [SE2:巽]Xun (+) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 3-Jade | [E2:卯]Mao (-) |
| P4 | 5-Yellow | [SE3:巳]Si (+) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 3-Jade | [E3:乙]Yi (-) |
| P4 | 9-Purple | [S1:丙]Bing (+) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 8-White | [NE1:丑]Chou (-) |
| P4 | 9-Purple | [S2:午]Wu (-) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 8-White | [NE2:艮]Gen (+) |
| P4 | 9-Purple | [S3:丁]Ding (-) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 8-White | [NE3:寅]Yin (+) |
| P4 | 7-Red | [W1:庚]Geng (+) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 1-White | [N1:壬]Ren (+) |
| P4 | 7-Red | [W2:酉]You (-) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 1-White | [N2:子]Zi (-) |
| P4 | 7-Red | [W3:辛]Xin (-) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 1-White | [N3:癸]Gui (-) |
| P5 | 7-Red | [W1:庚]Geng (+) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 3-Jade | [E1:甲]Jia (+) |
| P5 | 7-Red | [W2:酉]You (-) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 3-Jade | [E2:卯]Mao (-) |
| P5 | 7-Red | [W3:辛]Xin (-) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 3-Jade | [E3:乙]Yi (-) |
| P5 | 6-White | [NW1:戌]Xu (-) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 4-Green | [SE1:辰]Chen (-) |
| P5 | 6-White | [NW2:乾]Qian (+) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 4-Green | [SE2:巽]Xun (+) |
| P5 | 6-White | [NW3:亥]Hai (+) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 4-Green | [SE3:巳]Si (+) |
| P5 | 1-White | [N1:壬]Ren (+) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 9-Purple | [S1:丙]Bing (+) |
| P5 | 1-White | [N2:子]Zi (-) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 9-Purple | [S2:午]Wu (-) |
| P5 | 1-White | [N3:癸]Gui (-) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 9-Purple | [S3:丁]Ding (-) |
| P5 | 8-White | [NE1:丑]Chou (-) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 2-Black | [SW1:未]Wei (-) |
| P5 | 8-White | [NE2:艮]Gen (+) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 2-Black | [SW2:坤]Kun (+) |
| P5 | 8-White | [NE3:寅]Yin (+) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 2-Black | [SW3:申]Shen (+) |
| P6 | 8-White | [NE1:丑]Chou (-) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 4-Green | [SE1:辰]Chen (-) |
| P6 | 8-White | [NE2:艮]Gen (+) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 4-Green | [SE2:巽]Xun (+) |
| P6 | 8-White | [NE3:寅]Yin (+) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 4-Green | [SE3:巳]Si (+) |
| P6 | 7-Red | [W1:庚]Geng (+) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 5-Yellow | [NW1:戌]Xu (-) |
| P6 | 7-Red | [W2:酉]You (-) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 5-Yellow | [NW2:乾]Qian (+) |
| P6 | 7-Red | [W3:辛]Xin (-) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 5-Yellow | [NW3:亥]Hai (+) |
| P6 | 2-Black | [SW1:未]Wei (-) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 1-White | [N1:壬]Ren (+) |
| P6 | 2-Black | [SW2:坤]Kun (+) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 1-White | [N2:子]Zi (-) |
| P6 | 2-Black | [SW3:申]Shen (+) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 1-White | [N3:癸]Gui (-) |
| P6 | 9-Purple | [S1:丙]Bing (+) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 3-Jade | [E1:甲]Jia (+) |
| P6 | 9-Purple | [S2:午]Wu (-) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 3-Jade | [E2:卯]Mao (-) |
| P6 | 9-Purple | [S3:丁]Ding (-) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 3-Jade | [E3:乙]Yi (-) |
| P7 | 9-Purple | [S1:丙]Bing (+) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 5-Yellow | [W1:庚]Geng (+) |
| P7 | 9-Purple | [S2:午]Wu (-) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 5-Yellow | [W2:酉]You (-) |
| P7 | 9-Purple | [S3:丁]Ding (-) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 5-Yellow | [W3:辛]Xin (-) |
| P7 | 8-White | [NE1:丑]Chou (-) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 6-White | [NW1:戌]Xu (-) |
| P7 | 8-White | [NE2:艮]Gen (+) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 6-White | [NW2:乾]Qian (+) |
| P7 | 8-White | [NE3:寅]Yin (+) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 6-White | [NW3:亥]Hai (+) |
| P7 | 3-Jade | [E1:甲]Jia (+) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 2-Black | [SW1:未]Wei (-) |
| P7 | 3-Jade | [E2:卯]Mao (-) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 2-Black | [SW2:坤]Kun (+) |
| P7 | 3-Jade | [E3:乙]Yi (-) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 2-Black | [SW3:申]Shen (+) |
| P7 | 1-White | [N1:壬]Ren (+) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 4-Green | [SE1:辰]Chen (-) |
| P7 | 1-White | [N2:子]Zi (-) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 4-Green | [SE2:巽]Xun (+) |
| P7 | 1-White | [N3:癸]Gui (-) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 4-Green | [SE3:巳]Si (+) |
| P8 | 1-White | [N1:壬]Ren (+) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 6-White | [NW1:戌]Xu (-) |
| P8 | 1-White | [N2:子]Zi (-) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 6-White | [NW2:乾]Qian (+) |
| P8 | 1-White | [N3:癸]Gui (-) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 6-White | [NW3:亥]Hai (+) |
| P8 | 9-Purple | [S1:丙]Bing (+) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 7-Red | [W1:庚]Geng (+) |
| P8 | 9-Purple | [S2:午]Wu (-) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 7-Red | [W2:酉]You (-) |
| P8 | 9-Purple | [S3:丁]Ding (-) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 7-Red | [W3:辛]Xin (-) |
| P8 | 4-Green | [SE1:辰]Chen (-) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 3-Jade | [E1:甲]Jia (+) |
| P8 | 4-Green | [SE2:巽]Xun (+) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 3-Jade | [E2:卯]Mao (-) |
| P8 | 4-Green | [SE3:巳]Si (+) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 3-Jade | [E3:乙]Yi (-) |
| P8 | 2-Black | [SW1:未]Wei (-) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 5-Yellow | [NE1:丑]Chou (-) |
| P8 | 2-Black | [SW2:坤]Kun (+) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 5-Yellow | [NE2:艮]Gen (+) |
| P8 | 2-Black | [SW3:申]Shen (+) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 5-Yellow | [NE3:寅]Yin (+) |
| P9 | 2-Black | [SW1:未]Wei (-) | 7-Red | [W1:庚]Geng (+) | 3-Jade | [E1:甲]Jia (+) | 7-Red | [W1:庚]Geng (+) |
| P9 | 2-Black | [SW2:坤]Kun (+) | 7-Red | [W2:酉]You (-) | 3-Jade | [E2:卯]Mao (-) | 7-Red | [W2:酉]You (-) |
| P9 | 2-Black | [SW3:申]Shen (+) | 7-Red | [W3:辛]Xin (-) | 3-Jade | [E3:乙]Yi (-) | 7-Red | [W3:辛]Xin (-) |
| P9 | 1-White | [N1:壬]Ren (+) | 6-White | [NW1:戌]Xu (-) | 4-Green | [SE1:辰]Chen (-) | 8-White | [NE1:丑]Chou (-) |
| P9 | 1-White | [N2:子]Zi (-) | 6-White | [NW2:乾]Qian (+) | 4-Green | [SE2:巽]Xun (+) | 8-White | [NE2:艮]Gen (+) |
| P9 | 1-White | [N3:癸]Gui (-) | 6-White | [NW3:亥]Hai (+) | 4-Green | [SE3:巳]Si (+) | 8-White | [NE3:寅]Yin (+) |
| P9 | 5-Yellow | [S1:丙]Bing (+) | 1-White | [N1:壬]Ren (+) | 9-Purple | [S1:丙]Bing (+) | 4-Green | [SE1:辰]Chen (-) |
| P9 | 5-Yellow | [S2:午]Wu (-) | 1-White | [N2:子]Zi (-) | 9-Purple | [S2:午]Wu (-) | 4-Green | [SE2:巽]Xun (+) |
| P9 | 5-Yellow | [S3:丁]Ding (-) | 1-White | [N3:癸]Gui (-) | 9-Purple | [S3:丁]Ding (-) | 4-Green | [SE3:巳]Si (+) |
| P9 | 3-Jade | [E1:甲]Jia (+) | 8-White | [NE1:丑]Chou (-) | 2-Black | [SW1:未]Wei (-) | 6-White | [NW1:戌]Xu (-) |
| P9 | 3-Jade | [E2:卯]Mao (-) | 8-White | [NE2:艮]Gen (+) | 2-Black | [SW2:坤]Kun (+) | 6-White | [NW2:乾]Qian (+) |
| P9 | 3-Jade | [E3:乙]Yi (-) | 8-White | [NE3:寅]Yin (+) | 2-Black | [SW3:申]Shen (+) | 6-White | [NW3:亥]Hai (+) |
In the table above, the symbol (+) indicates a movement in the forward direction when plotting the flying stars, and the symbol (-) indicates a movement in the backward direction. In a forward direction, the number of the current "Palace" or grid is increased by one when filling in the next "Palace". In a backward direction, the number is decremented by one when filling in the next "Palace". For example, if the number "3" is used to fill in the current grid, then the number "4" will be put into the next grid if the symbol is (+), or the number "2" will be put into the next grid if the symbol is (-).
In a traditional Luopan, the (+) symbol is depicted as an empty circle (or a white circle), whereas the (-) symbol is depicted as a filled or black circle.