It is perfectly logical that Malaysian would be tankering fuel running up to China. It is a govt-owned carrier that reportedly is running well into the red. For all we know, the fuel guys up there will not extend credit, or keep a tight leash on the outstanding receivables, or are demanding a prepaid surety account, or have cut the carrier off completely. TWA got into that bind in its last days (actually, the last year). Nobody would sell them fuel on open account. Since Malaysia is a "producer," and the govt has its fingers in that pie, likely some brother-in-law has the supply contract and gets the fuel at say 17 cents a gal. and re-sells it to the Carrier at say $2.20. Meanwhile the Chinese guys are demanding cash up front at (pick your number) $4.00. The solution is driven by the economic realities: they tanker.
I noted that everybody was being very cagey about saying "the normal fuel load was taken on." Normal for what? Normal for the flight parameters, or normal for their not having open-account credit in Beijing? Or, normal for the brother-in-law? Nobody knows. Hey, it's Asia; things are opaque as a matter of course.