Correct

并 vs 并且

/ bìng vs bìngqiě /
Strokes

Formula

1
不但……并且……

Definition

并 as an Adverb or a Conjunction, 并且 only as a Conjunction; which both means [side by side; simultaneously; and].

Example

并, as an Adverb, expresses two or more things that exist simultaneously, mostly used before monosyllabic verbs; while 并且 cannot be used.
1
Zhè
liǎng
zhǒng
shuō
说法
可以
bìngcún
并存
  

The two expressions are both acceptable.

2
lùn
理论
shíjiàn
实践
yīnggāi
应该
bìngzhòng
并重
  

Theory and practice should be equally valued.

3
wéi
以为
tu
糊涂
  
,
shí
其实
bìng
并不
tu
糊涂
  

You thought he was stupid;in fact,he is not stupid at all.

并 can be used in front of a negative word to reinforce the tone of negation or refutation; while 并且 cannot be used.
4
wéi
以为
tu
糊涂
  
,
shí
其实
bìng
并不
tu
糊涂
  

You thought he was stupid; in fact, he is not stupid at all.

5
Zhè
jiàn
shì
bìng
méiyǒu
没有
tóng
同意
ya
  
!

As for this matter, I didn't agree to it at all.

6
men
我们
zhǔzhāng
主张
jiā
大家
tuánjié
团结
  
,
dàn
tuánjié
团结
bìngfēi
并非
tuánqi
一团和气
  

We advocate unity, which does not mean keeping on good terms with everyone at the expense of principles.

并 and 并且 are interchangeable when indicating two actions or conditions happen one after another or simultaneously (used between two predicates or phrases, or between two auxiliaries).
Used in the second clause to show progression.
7
men
他们
yánjiū
研究
bìng
  
(
bìngqiě
并且
  
)
zhìdìng
制定
le
gōngzuò
工作
huà
计划
  

They studied and have worked out a work plan.

8
Zhège
这个
xiàng
项目
  
,
men
我们
yīnggāi
应该
bìng
  
(
bìngqiě
并且
  
)
必须
ànshí
按时
wánchéng
完成
  

The project should and must be completed on time.

9
1997
1997
nián
xué
大学
毕业
  
,
bìng
  
(
bìngqiě
并且
  
)
tóngnián
同年
chūbǎn
出版
第一
běn
zhezuō
著作
  

He graduated from university in 1997 and published his first book in the same year.

10
jiā
大家
chū
提出
le
fāngàn
方案
  
,
bìng
  
(
bìngqiě
并且
  
)
zhǐdìng
指定
zhuānrén
专人
负责
wánchéng
完成
  

We have worked out a plan and assigned a person specially to carry it out.

11
men
他们
liǎ
xiāngài
相爱
  
,
bìng
  
(
bìngqiě
并且
  
)
zhǔnbèi
准备
jiéhūn
结婚
  

They love each other and are about to get married.

并且 as a Conjunction to means "beside or moreover, mostly used between descriptive words or phrases and even clauses".
12
Zhèzhǒng
这种
shāngpǐn
商品
biàn
便宜
bìngqiě
并且
nàiyòng
耐用
  

The merchandise is cheap and enduring.

13
Zhè
zuò
jiànzhù
建筑
kuānchang
宽敞
shìyòng
适用
bìngqiě
并且
huánjìng
环境
yōu
幽雅
  

The building is spacious and suitable; what is more, the surrounding is fine.

14
men
他们
qíng
情绪
hěn
gāo
bìngqiě
并且
měige
每个
rén
dōu
zuòhǎo
做好
le
zhǔnbèi
准备
  

They are in high spirits and each of them has made full preparation.

并且 as a Conjunction used in 不但……并且……
不但……并且……
15
dàn
不但
jiànkāng
健康
  
,
bìngqiě
并且
chángshòu
长寿
  

He was not only healthy, but lived a long life.

16
dàn
不但
huan
喜欢
gāngqín
钢琴
  
,
bìngqiě
并且
néng
yǎnzòu
演奏
hěnduō
很多
曲目
  

She not only likes piano, but also can play many melodies.