There are lots of Chinese brick brands, many of are actually connected and made in the same factory. For instance the same brand could make a spin-off for original designs, inspired designs and MOCs.
Lepin
Lepin itself is not around anymore, but their brands Xingbao, Urge, Zebra, G, Eagle, Lion King, and King/Queen/Jack are still around.
Xingbao: Xingbao mass produces MOCs
Urge: Urge makes modular Buildings
Zebra / G / Eagle / Lion King: These brands copy other designs
King / Queen / Jack: These brands offer a wide selection of sets inspired by other brands and are the most well known and widest available.
Lele
Lele is similar in name to lepin, but another company. It owns the brands Zhega, Xiang and PRCK
MouldKing
Mould King is it’s own brands, focusing on MOCs. It’s not to be confused with King.
Sheng Yuan
SY owns fairly well known brand Sembo and Ding Gao
Bela
Bela company owns Leyi and Weile
Panlos
Panlos also owns the Kaiyu brand
Decool
Decool operates Decool and Jisi brands
Double Eagle
Double Eagle owns Cada brand, which is most well known for it’s original technic designs, but also has non-technic sets.
Rael
Rael operates a brand in it’s own name and Super 18k
Leji
Leji controls the Leji brand
SX
is another smaller brand that only controls a brand und it’s own name, SX Brick
QZL
QZL operates the XD brick brand
Xinyu
Xinyu operates two brands, Xinyu and Pangu
DK
DK brand offers a variety of different styles of sets
