U.S. President Donald Trump meets with Saudi Arabia's Deputy Crown Prince and Minister of Defense Mohammed bin Salman (center L) at the Ritz Carlton Hotel in Riyadh, Saudi Arabia May 20, 2017. (Xinhua/Reuters Photo)

BEIJING, May 22 (Xinhua) -- U.S. President Donald Trump has wrapped up a two-day tour to Saudi Arabia that aimed to "reset" U.S. relations with the conflict-laden region, although his statements revealed more ambiguities than explicitness in dealing with the spiny problems in the Middle East.

The visit came as the dynamics between the United States and the region's major players are moving in unpredictable directions. The following listed some major highlights that have hit the headlines in Trump's stay in Riyadh.

WHOPPING ARM SALES

Trump and Saudi King Salman bin Abdulaziz Al Saud signed defense and business deals worth 280 billion U.S. dollars, which analysts said eyes to shore up the U.S.-Saudi defense ties and represents the most substantial gain of his first overseas trip since taking office.

According to local Al Arabiya news, U.S. defense contractor Raytheon announced partnership with Saudi military industries, under which Raytheon's Arab branch will help develop smart weapons and air defense systems in Saudi Arabia.

Boeing Company also announced that Saudi Arabia has agreed to buy Chinook helicopters, associated support services and guided weapons systems, and purchase P-8 surveillance aircraft. The company also said it will negotiate the sale of up to 16 widebody airplanes to Saudi Gulf Airlines.

U.S. General Electric (GE) also signed 15-billion-dollar deals with Saudi Arabia to boost the latter's non-oil economy.

However, the whopping military deals have sparked concerns both in Israel and Iran.

Yuval Steinitz, an Israeli senior Cabinet minister and confidant of Prime Minister Benjamin Netanyahu, said Saudi Arabia is "a hostile country" and the deal was "definitely something that should trouble us."

Meanwhile, in the first reaction to Trump's visit after Iranian President Hassan Rouhani's re-election to a second term, Iranian Foreign Minister Mohammad Javad Zarif also tweeted on Sunday that Washington may be "milking" Saudi Arabia, Tehran's Gulf rival, of billions' dollars.

"Iran -- fresh from real elections -- attacked by @POTUS in that bastion of democracy &moderation. Foreign Policy or simply milking KSA of $480B?" Zarif tweeted.

UNCERTAINTIES IN U.S. MIDDLE EAST POLICIES

In the just-concluded Arab Islamic American summit, Trump delivered a speech, the centerpiece of his tour, to leaders of 55 Islamic countries, which many analysts said indicates his ambiguities on Middle East policy.

In his 30-minute speech, Trump called on Arab leaders to do their fair share to "drive out" terrorism from their countries. "A better future is only possible if your nations drive out the terrorists and drive out the extremists," he said.

"Drive them out! Drive them out of your places of worship. Drive them out of your communities. Drive them out of your holy land and drive them out of this earth," he added.

Trump's signature term "radical Islamic terrorism" was reportedly not included in the speech. Instead, he used "Islamist extremism," which refers to Islamism as political movement rather than Islam as a religion, a distinction that he had frequently attacked his predecessor Barack Obama for making.

Trump had frequently attacked Muslims on the campaign trail last year and tried to ban many from entering the United States since taking office. But according to U.S. Secretary of State Rex Tillerson, he "is clearly indicating that this fight ... has nothing to do with religion. It has nothing to do with country. It has nothing to do with ethnicity."

On the other high-profile issue of Iran, Trump held Tehran responsible for training armed groups in the wars in Syria, Yemen and Iraq, and urged the international community to isolate the country.

However, Tillerson hinted on Saturday that he was open to direct talks with Iran. "I've never shut off the phone to anyone that wants to talk or have a productive conversation ... At this point, I have no plans to call my counterpart in Iran, although in all likelihood we will talk at the right time."

LONG-STALLED ISRAEL-PALESTINE PEACE DEAL

Another highlight of Trump's tour is his readiness in the coming two-day visit to Israel to work with it and Palestine, in a bid to dispel the two sides' historical grudges, resume the long-stalled peace talks and mull a deal based on those.

So far, the president has offered few indications as of how he plans to achieve the goals above-mentioned, which so many of his predecessors could not.

Israeli observers became wary of the possible tougher line Trump would take on Jewish settlements building in the West Bank, as the latter has urged Israeli restraint in this regard.

The new White House host has also seemed to retreat from his campaign pledge to move the U.S. Embassy from Tel Aviv to Jerusalem. A White House official speaking on condition of anonymity said lately that Trump believed that recognizing Jerusalem as Israel's capital "would not be wise at this time."

Adding to Tel Aviv's concerns, U.S. national security adviser H.R. McMaster voiced support last week for Palestinian "self-determination."

Trump's relations with Tel Aviv has been at stake, as he was revealed to have disclosed highly classified intelligence Israel obtained about the IS with top Russian officials, without Israel's permission.

The last round of talks reached an impasse on April 2014, mainly over Israel's refusal to halt the construction in the West Bank settlements.

Israeli newspaper Ha'aretz reported that Trump will ask the Israelis to curb the expansion of the settlements and call on the Palestinians to halt funding Palestinian prisoners in Israeli jails and stop the "incitement" against Israel.

The status of Jerusalem remains one of the core issues in the Israeli-Palestinian conflict. So far, the international community does not recognize Jerusalem as the capital of Israel and no foreign countries have based their embassies in the city.