1. input t-code:SMLT.
   
   

   Find the language alreadey installed in system.

input t-code:se38, input RSCPINST in program textbox area. 

select Chinese , click Activate. 

click Yes.

if show below windows ,it means Chinese language has been actived. 

log on again, will find interface are all Chinese. 

If you not click Activate button, then system will show below error.

other solution is :edit server\usr\sap\lei\prfile\lei_dvebmgsoo_hangyc.txt配置文件，把如下的内容复制过去也可以的。

SAPSYSTEMNAME=LEI

INSTANCE_NAME=DVEBMGS00

SAPSYSTEM=00

rdisp/wp_no_dia=6

rdisp/wp_no_btc=2

rdisp/wp_no_vb=5

rdisp/wp_no_vb2=2

rdisp/wp_no_enq=1

rdisp/wp_no_spo=1

SAPGLOBALHOST=hangyc

PHYS_MEMSIZE=2400

DIR_TRANS=C:\usr\sap\trans

icm/server_port_0=PROT=HTTP,PORT=8000,EXTBIND=1

DIR_ORAHOME=C:\oracle\ora92

install/collate/active 0 

zcsa/installed_languages = 1EJDM

install/codepage/appl_server = 8400

install/codepage/appl_server = 8000

install/codepage/appl_server = 8300

install/codepage/appl_server = 1100

install/codepage/db/non_transp = 8400

install/codepage/db/non_transp = 8000

install/codepage/db/non_transp = 8300

install/codepage/db/non_transp = 1100

install/codepage/db/transp = 8400

install/codepage/db/transp = 8000

install/codepage/db/transp = 8300

install/codepage/db/transp = 1100