Summarize this text. Leave the all-caps part out of the summary.

Chinese espionage is becoming more difficult for U.S. companies to track. The Asian country is shifting to targeting internet security services, researchers for Google said in a report Thursday.
The researchers said they recently discovered a new virus targeting the software security company Fortinet. Alleged Chinese hackers used a "back door" to hack the security company's system and upload malicious code to the company's security management tool, according to the report.

RUSSIA IS HELPING CHINA SPEED UP ITS NUCLEAR BUILDUP. THE US IS UNPREPARED TO COUNTER IT 

"Given how incredibly difficult they are to find, most organizations cannot identify them on their own," Charles Carmakal, chief technology officer at the Google-owned company Mandiant, said in a statement to Axios. "It’s not uncommon for Chinese campaigns to end up as multi-year intrusions."
system
is paath ko saranshit karen.saransh se ol-caps part ko chhod den.

america companiyon ke liye trek karnaa adhik kathin hota ja rahaa he.asian desh internet suraksha sevaaon ko lakshith karne ke liye sthanantarit ho rahaa he, Google ke shodhakartaaon ne guuruuvaar ko ek report main kaha.
shodhakartaaon ne kaha ki unhone haal hi main software suraksha company fortinet ko lakshith karne vaale ek nae virus kii khoj kii.kathith chini havers ne report ke anusaar, suraksha company ke system ko hack karne or company ke suraksha prabandhan upkaran par durbhaavnapurna code aplod karne ke liye "back door" kaa upyog kiya.

rus china ko apane parmaanu bilssop ko gati dene main madad kar rahaa he.america iskaa muqabla karne ke liye taiyaar nahin he

Google ke swaamitv vaali company Mandiant ke mukhya praudyogiki adhikari charles karmakal ne kaha, "ve kitna avishwasaneey rup se mushkil hai, adhikansh sanghathan unhen apane dam par pahchaan nahin sakate hai.""chini abhiyaanon ke liye bahu-varshiya ghuspaith ke rup main samaapt hona asaamaanya nahin he."
user
america companiyon ko trek karne ke liye chini jasusi ko kathin lag rahaa he.china apane hamalon ko internet suraksha sevaaon main badal rahaa he.Google shodhakartaaon ne haal hi main ek software suraksha company fortinet ko lakshith karne vaale ek nae virus kii khoj kii he.chini havers ne company ke system ko hack karne ke liye "back door" kaa upyog kiya or company ke suraksha prabandhan upkaran par durbhaavnapurna code aplod kiya.charles karmakal ne kaha, "sanghathan apane hamalon kii pahchaan nahin kar sakate hai, chini hamalaa abhiyaan bahu-varshiya ghuspaith ke rup main samaapt ho sakate hai."
assistant
<|system|>
</s>
<|user|>
is paath ko saranshit karen.saransh se ol-caps part ko chhod den.

america companiyon ke liye trek karnaa adhik kathin hota ja rahaa he.asian desh internet suraksha sevaaon ko lakshith karne ke liye sthanantarit ho rahaa he, Google ke shodhakartaaon ne guuruuvaar ko ek report main kaha.
shodhakartaaon ne kaha ki unhone haal hi main software suraksha company fortinet ko lakshith karne vaale ek nae virus kii khoj kii.kathith chini havers ne report ke anusaar, suraksha company ke system ko hack karne or company ke suraksha prabandhan upkaran par durbhaavnapurna code aplod karne ke liye "back door" kaa upyog kiya.

rus china ko apane parmaanu bilssop ko gati dene main madad kar rahaa he.america iskaa muqabla karne ke liye taiyaar nahin he

Google ke swaamitv vaali company Mandiant ke mukhya praudyogiki adhikari charles karmakal ne kaha, "ve kitna avishwasaneey rup se mushkil hai, adhikansh sanghathan unhen apane dam par pahchaan nahin sakate hai.""chini abhiyaanon ke liye bahu-varshiya ghuspaith ke rup main samaapt hona asaamaanya nahin he."</s>
<|assistant|>
america companiyon ko trek karne ke liye chini jasusi ko kathin lag rahaa he.china apane hamalon ko internet suraksha sevaaon main badal rahaa he.Google shodhakartaaon ne haal hi main ek software suraksha company fortinet ko lakshith karne vaale ek nae virus kii khoj kii he.chini havers ne company ke system ko hack karne ke liye "back door" kaa upyog kiya or company ke suraksha prabandhan upkaran par durbhaavnapurna code aplod kiya.charles karmakal ne kaha, "sanghathan apane hamalon kii pahchaan nahin kar sakate hai, chini hamalaa abhiyaan bahu-varshiya ghuspaith ke rup main samaapt ho sakate hai."</s>
