<span style="color: #222222;">China today warned of retaliation against US President Donald Trump's order that effectively barred Chinese telecom giant Huawei from the US market. </span><br />'' <br />'' <span style="color: #222222;">Chinese Foreign Ministry spokesman Lu Kang said China will take necessary measures to safeguard rights and interest of its business firms. He, however, parried questions over what measures China would take, saying the commerce ministry would come out with a response.</span><br />'' <br />'' <span style="color: #222222;">Yesterday US President Trump signed an executive order barring American companies from installing the foreign-made telecom equipment posing a national security threat. </span><br />'' <br />'' <span style="color: #222222;">The order does not name any company but is believed to target Huawei. Meanwhile, Huawei termed the executive order as unreasonable, saying that the US is infringing upon the firm's rights. </span><br />''  <br />