Heian Age

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Heian Age (平安时代; pinyin: Píng'ānshídài, translation: Era of Peace), stylized in-game as heian age, is the 16th world released in the Chinese version of Plants vs. Zombies 2. Part One was released in the 2.6.0. update on January 22, 2021 on Android devices. Part Two was released in the 2.6.4 update on April 25, 2021 for iOS and Android devices.

There are a few mechanics encountered in this world;

The primary mechanic of this world are the Saisen Boxes, Saisen Boxes are neutral grid obstacles that cannot be damaged or destroyed by plants. However, Saisen Boxes are able to block all non-lobbed and non-piercing projectiles. If the player drags Plant Food onto a Saisen Box, they will receive either a reward or a boost effect depending on the type of Saisen Box. There are currently four types of Saisen Boxes:
- Sun: If the player drops Plant Food into a Sun Saisen Box, the box will return half of the sunlight base on the plants planted within the 3x3 area around the box.
- Plant Food: If the player drops Plant Food into a Plant Food Saisen Box, the box will activate the Plant Food effects of all plants within a 3x3 area around the box.
- Upgrade: If the player drops Plant Food into a Upgrade Saisen Box, the box will upgrade all plants within a 3x3 area up one level, if a plant's level is maxed out it will simply activate its Plant Food ability.
- Plant: If the player drops Plant Food into a Plant Saisen Box, the box will produce one plant for the player to use. The level of the plant produced will change depending on the level's difficulty, Level 3 for an easy level, Level 5 for a hard level.
Another mechanic of the world is the Divine Wind, which is able to appear in any random rows and operates in two phases:
- First there is the "Small Wind", which pushes a random amount of small and medium sized zombies forward.
- Finally there is the "Big Wind", which is able to blow away any plants that are not behind a Windbreak Dendrobium.

Origins

As its name says, Heian Age takes place during the Heian period of Japan, a period in Japanese history spanning from 794 to 1185. The Heian period is noted by a decline in Chinese influences and an increase in imperial art, poetry, and literature.

Levels

Day	Plants	Flags	Notes
1	Choice without sun-making or free plants	One	Last Stand level
2	Choice with	Two
3	Choice with	Two
4		Two	Special Delivery level
5	Choice with	One
6	Choice	Two
7		Two	Special Delivery level
8	Choice with	Two
9		Two	Special Delivery level
10	Choice	Two
11	Choice with	Two
12		One	Special Delivery level
13	Choice with	Two
14	Choice	Two
15	Choice, five endangered	Two	Save Our Seeds level
16	Two, three in Hard Mode	Three s to pass the level	The Adventures of Zotaro level
17	Choice without sun-making or free plants	Two	Last Stand level
18	Choice	Two