While some recent esti­mates have more than 90 per­cent of cyberes­pi­onage in the Unit­ed States orig­i­nat­ing in Chi­na, the accu­sa­tions relayed in the Pentagon’s annu­al report to Con­gress on Chi­nese mil­i­tary capa­bil­i­ties were remark­able in their direct­ness. Until now the admin­is­tra­tion avoid­ed direct­ly accus­ing both the Chi­nese gov­ern­ment and the People’s Lib­er­a­tion Army of using cyber­weapons against the Unit­ed States in a delib­er­ate, gov­ern­ment-devel­oped strat­e­gy to steal intel­lec­tu­al prop­er­ty and gain strate­gic advantage.

“In 2012, numer­ous com­put­er sys­tems around the world, includ­ing those owned by the U.S. gov­ern­ment, con­tin­ued to be tar­get­ed for intru­sions, some of which appear to be attrib­ut­able direct­ly to the Chi­nese gov­ern­ment and mil­i­tary,” the near­ly 100-page report said.

The report, released Mon­day, described China’s pri­ma­ry goal as steal­ing indus­tri­al tech­nol­o­gy, but said many intru­sions also seemed aimed at obtain­ing insights into Amer­i­can pol­i­cy mak­ers’ think­ing. It warned that the same infor­ma­tion-gath­er­ing could eas­i­ly be used for “build­ing a pic­ture of U.S. net­work defense net­works, logis­tics, and relat­ed mil­i­tary capa­bil­i­ties that could be exploit­ed dur­ing a crisis.”

It was unclear why the admin­is­tra­tion chose the Pen­ta­gon report to make asser­tions that it has long declined to make at the White House. A White House offi­cial declined to say at what lev­el the report was cleared. A senior defense offi­cial said “this was a thor­ough­ly coor­di­nat­ed report,” but did not elaborate.

On Tues­day, a spokes­woman for the Chi­nese Min­istry of For­eign Affairs, Hua Chun­y­ing, crit­i­cized the report.

‘‘Chi­na has repeat­ed­ly said that we res­olute­ly oppose all forms of hack­er attacks,’’ she said. ‘‘We’re will­ing to car­ry out an even-tem­pered and con­struc­tive dia­logue with the U.S. on the issue of Inter­net secu­ri­ty. But we are firm­ly opposed to any ground­less accu­sa­tions and spec­u­la­tions, since they will only dam­age the coop­er­a­tion efforts and atmos­phere between the two sides to strength­en dia­logue and cooperation.’’

Miss­ing from the Pen­ta­gon report was any acknowl­edg­ment of the sim­i­lar abil­i­ties being devel­oped in the Unit­ed States, where bil­lions of dol­lars are spent each year on cyberde­fense and con­struct­ing increas­ing­ly sophis­ti­cat­ed cyber­weapons. Recent­ly the direc­tor of the Nation­al Secu­ri­ty Agency, Gen. Kei­th Alexan­der, who is also com­man­der of the military’s fast-grow­ing Cyber Com­mand, told Con­gress that he was cre­at­ing more than a dozen offen­sive cyberunits, designed to mount attacks, when nec­es­sary, at for­eign com­put­er networks.

When the Unit­ed States mount­ed its cyber­at­tacks on Iran’s nuclear facil­i­ties ear­ly in Pres­i­dent Obama’s first term, Mr. Oba­ma expressed con­cern to aides that Chi­na and oth­er states might use the Amer­i­can oper­a­tions to jus­ti­fy their own intrusions.

But the Pen­ta­gon report describes some­thing far more sophis­ti­cat­ed: A Chi­na that has now leapt into the first ranks of offen­sive cybertech­nolo­gies. It is invest­ing in elec­tron­ic war­fare capa­bil­i­ties in an effort to blind Amer­i­can satel­lites and oth­er space assets, and hopes to use elec­tron­ic and tra­di­tion­al weapons sys­tems to grad­u­al­ly push the Unit­ed States mil­i­tary pres­ence into the mid-Pacif­ic near­ly 2,000 miles from China’s coast.

The report argues that China’s first air­craft car­ri­er, the Liaon­ing, com­mis­sioned last Sep­tem­ber, is the first of sev­er­al car­ri­ers the coun­try plans to deploy over the next 15 years. It said the car­ri­er would not reach “oper­a­tional effec­tive­ness” for three or four years, but is already set to oper­ate in the East and South Chi­na Seas, the site of China’s ter­ri­to­r­i­al dis­putes with sev­er­al neigh­bors, includ­ing Japan, Indone­sia, the Philip­pines and Viet­nam. The report notes a new car­ri­er base under con­struc­tion in Yuchi.

The report also detailed China’s progress in devel­op­ing its stealth air­craft, first test­ed in